Update validate-modules (#20932)

* Update validate-modules

* Validates ANSIBLE_METADATA
* Ensures imports happen after documentation vars
* Some pep8 cleanup

* Clean up some left over unneeded code

* Update modules for new module guidelines and validate-modules checks

* Update imports for ec2_vpc_route_table and ec2_vpc_nat_gateway

lib/ansible/modules/source_control/github_hooks.py

@@ -18,17 +18,6 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-try:
-    import json
-except ImportError:
-    try:
-        import simplejson as json
-    except ImportError:
-        # Let snippet from module_utils/basic.py return a proper error in this case
-        pass
-
-import base64
-
 ANSIBLE_METADATA = {'status': ['preview'],
                     'supported_by': 'community',
                     'version': '1.0'}
@@ -97,6 +86,18 @@ EXAMPLES = '''
   delegate_to: localhost
 '''
 
+try:
+    import json
+except ImportError:
+    try:
+        import simplejson as json
+    except ImportError:
+        # Let snippet from module_utils/basic.py return a proper error in this case
+        pass
+
+import base64
+
+
 def _list(module, hookurl, oauthkey, repo, user):
     url = "%s/hooks" % repo
     auth = base64.encodestring('%s:%s' % (user, oauthkey)).replace('\n', '')