cloudflare_dns: minor code improvments

Tweaked some things on top of the well done PR #1768

- json import
- fix expetion handling
- fix indentation

network/cloudflare_dns.py

@@ -18,7 +18,14 @@
 # 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 urllib
 
 DOCUMENTATION = '''
@@ -263,7 +270,7 @@ class CloudflareAPI(object):
             result = json.loads(content)
         except AttributeError:
             error_msg += "; The API response was empty"
-        except JSONDecodeError:
+        except json.JSONDecodeError:
             error_msg += "; Failed to parse API response: {0}".format(content)
 
         # received an error status but no data with details on what failed