Point at awx devel collection

* awx.awx collection on galaxy is ooooold at this point. Releases are
  paused, so point at awx collection in devel to get that new bleeding
  edge hotness.

molecule/requirements.yml

@@ -4,4 +4,6 @@ collections:
   - name: kubernetes.core
   - name: operator_sdk.util
   - name: community.docker
-  - name: awx.awx
+  - name: https://github.com/ansible/awx.git#/awx_collection/
+    type: git
+    version: devel