Rename from community.kubernetes to kubernetes.core (#6)

* Rename from community.kubernetes to kubernetes.core

This goes through and renames community.kubernetes to kubernetes.core.
Most of this was generated from the downstream build script that was
used on the community repository, plus whatever hand edits I could find
that were needed.

The downstream build and test process has also been removed as this
repository is now the downstream repository.

* Fix CONTRIBUTING.md

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v2
         with:
-          path: ansible_collections/community/kubernetes
+          path: ansible_collections/kubernetes/core
 
       - name: Set up Python ${{ matrix.python_version }}
         uses: actions/setup-python@v1
@@ -31,7 +31,7 @@ jobs:
 
       - name: Run sanity tests on Python ${{ matrix.python_version }}
         run: make test-sanity PYTHON_VERSION=${{ matrix.python_version }}
-        working-directory: ./ansible_collections/community/kubernetes
+        working-directory: ./ansible_collections/kubernetes/core
 
   integration:
     runs-on: ubuntu-latest
@@ -43,7 +43,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v2
         with:
-          path: ansible_collections/community/kubernetes
+          path: ansible_collections/kubernetes/core
 
       - name: Set up Python ${{ matrix.python_version }}
         uses: actions/setup-python@v1
@@ -55,11 +55,11 @@ jobs:
 
       - name: Run integration tests on Python ${{ matrix.python_version }}
         run: make test-integration PYTHON_VERSION=${{ matrix.python_version }}
-        working-directory: ./ansible_collections/community/kubernetes
+        working-directory: ./ansible_collections/kubernetes/core
 
       - name: Generate coverage report.
         run: ansible-test coverage xml -v --requirements --group-by command --group-by version
-        working-directory: ./ansible_collections/community/kubernetes
+        working-directory: ./ansible_collections/kubernetes/core
 
       - uses: codecov/codecov-action@v1
         with:
@@ -74,7 +74,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v2
         with:
-          path: ansible_collections/community/kubernetes
+          path: ansible_collections/kubernetes/core
 
       - name: Set up KinD cluster
         uses: engineerd/setup-kind@v0.5.0
@@ -110,7 +110,7 @@ jobs:
 
       - name: Run molecule default test scenario
         run: make test-molecule
-        working-directory: ./ansible_collections/community/kubernetes
+        working-directory: ./ansible_collections/kubernetes/core
 
   unit:
     runs-on: ubuntu-latest
@@ -121,7 +121,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v2
         with:
-          path: ansible_collections/community/kubernetes
+          path: ansible_collections/kubernetes/core
 
       - name: Set up Python ${{ matrix.python_version }}
         uses: actions/setup-python@v1
@@ -133,82 +133,4 @@ jobs:
 
       - name: Run unit tests on Python ${{ matrix.python_version }}
         run: make test-unit PYTHON_VERSION=${{ matrix.python_version }}
-        working-directory: ./ansible_collections/community/kubernetes
-
-  downstream-sanity-29:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python_version: ['3.7']
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v2
-        with:
-          path: ansible_collections/community/kubernetes
-
-      - name: Set up Python ${{ matrix.python_version }}
-        uses: actions/setup-python@v1
-        with:
-          python-version: ${{ matrix.python_version }}
-
-      - name: Install ansible base (devel branch)
-        run: pip install "ansible>=2.9.0,<2.10.0"
-
-      - name: Run sanity tests on Python ${{ matrix.python_version }}
-        run: make downstream-test-sanity
-        working-directory: ./ansible_collections/community/kubernetes
-
-  downstream-integration-29:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        # Our old integration tests fail under newer Python versions.
-        python_version: ['3.6']
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v2
-        with:
-          path: ansible_collections/community/kubernetes
-
-      - name: Set up Python ${{ matrix.python_version }}
-        uses: actions/setup-python@v1
-        with:
-          python-version: ${{ matrix.python_version }}
-
-      - name: Install ansible base (devel branch)
-        run: pip install "ansible>=2.9.0,<2.10.0" pip==20.3.1
-
-      - name: Run integration tests on Python ${{ matrix.python_version }}
-        run: make downstream-test-integration
-        working-directory: ./ansible_collections/community/kubernetes
-
-  downstream-molecule-29:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python_version: ['3.7']
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v2
-        with:
-          path: ansible_collections/community/kubernetes
-
-      - name: Set up KinD cluster
-        uses: engineerd/setup-kind@v0.5.0
-
-      - name: Set up Python ${{ matrix.python_version }}
-        uses: actions/setup-python@v1
-        with:
-          python-version: ${{ matrix.python_version }}
-
-      - name: Install molecule and openshift dependencies
-        run: pip install "ansible>=2.9.0,<2.10.0" "molecule<3.3.0" yamllint openshift flake8
-
-      - name: Create default collection path symlink
-        run: |
-          mkdir -p /home/runner/.ansible
-          ln -s /home/runner/work/kubernetes/kubernetes /home/runner/.ansible/collections
-
-      - name: Run molecule default test scenario
-        run: make downstream-test-molecule
-        working-directory: ./ansible_collections/community/kubernetes
+        working-directory: ./ansible_collections/kubernetes/core