Update for modules which import json.

Some do not use the json module directly so don't need import json.
Some needed to fallback to simplejson with no traceback if neither was installed

Fixes #1298

lib/ansible/modules/extras/source_control/github_hooks.py

@@ -18,7 +18,15 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-import json
+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
 
 DOCUMENTATION = '''