be explicit about urllib import and remove conditional urllib(2) import

urllib and urllib2 have been in the python stdlib since at least
python-2.3.  There's no reason to conditionalize it.

Fixes https://github.com/ansible/ansible/issues/11322

lib/ansible/modules/extras/network/dnsmadeeasy.py

@@ -86,8 +86,8 @@ notes:
   - The DNS Made Easy service requires that machines interacting with the API have the proper time and timezone set. Be sure you are within a few seconds of actual time by using NTP. 
   - This module returns record(s) in the "result" element when 'state' is set to 'present'. This value can be be registered and used in your playbooks.
   
-requirements: [ urllib, urllib2, hashlib, hmac ]
-author: Brice Burgess
+requirements: [ hashlib, hmac ]
+author: "Brice Burgess (@briceburg)"
 '''
 
 EXAMPLES = '''
@@ -113,6 +113,8 @@ EXAMPLES = '''
 # DNSMadeEasy module specific support methods.
 #
 
+import urllib
+
 IMPORT_ERROR = None
 try:
     import json