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

molecule/default/tasks/template.yml

@@ -12,7 +12,7 @@
             name: "{{ template_namespace }}"
 
     - name: Check if k8s_service does not inherit parameter
-      community.kubernetes.k8s_service:
+      kubernetes.core.k8s_service:
         template: "pod_template_one.j2"
         state: present
       ignore_errors: yes
@@ -25,7 +25,7 @@
           - "'is only supported parameter for' in r.msg"
 
     - name: Specify both definition and template
-      community.kubernetes.k8s:
+      kubernetes.core.k8s:
         state: present
         template: "pod_template_one.j2"
         definition:
@@ -52,7 +52,7 @@
           - "'parameters are mutually exclusive' in r.msg"
 
     - name: Specify both src and template
-      community.kubernetes.k8s:
+      kubernetes.core.k8s:
         state: present
         src: "../templates/pod_template_one.j2"
         template: "pod_template_one.j2"
@@ -69,7 +69,7 @@
           - "'parameters are mutually exclusive' in r.msg"
 
     - name: Create pod using template (direct specification)
-      community.kubernetes.k8s:
+      kubernetes.core.k8s:
         template: "pod_template_one.j2"
         wait: yes
       vars:
@@ -83,7 +83,7 @@
           - r is successful
 
     - name: Create pod using template with wrong parameter
-      community.kubernetes.k8s:
+      kubernetes.core.k8s:
         template:
           - default
         wait: yes
@@ -100,7 +100,7 @@
           - "'Error while reading template file' in r.msg"
 
     - name: Create pod using template (path parameter)
-      community.kubernetes.k8s:
+      kubernetes.core.k8s:
         template:
           path: "pod_template_one.j2"
         wait: yes
@@ -115,7 +115,7 @@
           - r is successful
 
     - name: Create pod using template (different variable string)
-      community.kubernetes.k8s:
+      kubernetes.core.k8s:
         template:
           path: "pod_template_two.j2"
           variable_start_string: '[['
@@ -133,7 +133,7 @@
           - r is successful
 
     - name: Create pods using multi-resource template
-      community.kubernetes.k8s:
+      kubernetes.core.k8s:
         template:
           path: "pod_template_three.j2"
         wait: yes