Pin yamllint to 1.2.2 to avoid issues in 1.3.0. (#16464)

This also moves shippable test requirements to external files.

test/utils/shippable/code-smell-requirements.txt

@@ -0,0 +1 @@
+yamllint==1.2.2

test/utils/shippable/code-smell.sh

@@ -7,7 +7,8 @@ install_deps="${INSTALL_DEPS:-}"
 cd "${source_root}"
 
 if [ "${install_deps}" != "" ]; then
-    pip install yamllint
+    pip install -r "${source_root}/test/utils/shippable/code-smell-requirements.txt" --upgrade
+    pip list
 fi
 
 yamllint .

test/utils/shippable/sanity-requirements.txt

@@ -0,0 +1,4 @@
+tox
+pyyaml
+jinja2
+setuptools

test/utils/shippable/sanity.sh

@@ -15,13 +15,7 @@ if [ "${TOXENV}" = 'py24' ]; then
     python2.4 -m compileall -fq -x 'module_utils/(a10|rax|openstack|ec2|gce|docker_common|azure_rm_common|vca|vmware).py' lib/ansible/module_utils
 else
     if [ "${install_deps}" != "" ]; then
-        pip install \
-            tox \
-            pyyaml \
-            jinja2 \
-            setuptools \
-            --upgrade
-
+        pip install -r "${source_root}/test/utils/shippable/sanity-requirements.txt" --upgrade
         pip list
     fi