Doc fragments to plugins (#50172)

* promote doc_fragments into actual plugins

  change tests hardcoded path to doc fragments
  avoid sanity in fragments
  avoid improper testing of doc_fragments
  also change runner paths
 fix botmeta
 updated comment for fragments
 updated docs

lib/ansible/plugins/doc_fragments/aws_credentials.py

@@ -0,0 +1,39 @@
+# (c) 2017 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+
+class ModuleDocFragment(object):
+
+    # inventory cache
+    DOCUMENTATION = """
+options:
+  aws_profile:
+    description: The AWS profile
+    aliases: ['boto_profile']
+    env:
+      - name: AWS_PROFILE
+      - name: AWS_DEFAULT_PROFILE
+  aws_access_key:
+    description: The AWS access key to use.
+    env:
+      - name: AWS_ACCESS_KEY_ID
+      - name: AWS_ACCESS_KEY
+      - name: EC2_ACCESS_KEY
+  aws_secret_key:
+    description: The AWS secret key that corresponds to the access key.
+    env:
+      - name: AWS_SECRET_ACCESS_KEY
+      - name: AWS_SECRET_KEY
+      - name: EC2_SECRET_KEY
+  aws_security_token:
+    description: The AWS security token if using temporary access and secret keys.
+    env:
+      - name: AWS_SECURITY_TOKEN
+      - name: AWS_SESSION_TOKEN
+      - name: EC2_SECURITY_TOKEN
+  region:
+    description: The region for which to create the connection.
+    env:
+      - name: AWS_REGION
+      - name: EC2_REGION
+"""