Bulk autopep8 (modules)

As agreed in 2017-12-07 Core meeting bulk fix pep8 issues

Generated using:
autopep8 1.3.3 (pycodestyle: 2.3.1)
autopep8 -r  --max-line-length 160 --in-place --ignore E305,E402,E722,E741 lib/ansible/modules

Manually fix issues that autopep8 has introduced

lib/ansible/modules/database/postgresql/postgresql_ext.py

@@ -99,6 +99,7 @@ def ext_exists(cursor, ext):
     cursor.execute(query, {'ext': ext})
     return cursor.rowcount == 1
 
+
 def ext_delete(cursor, ext):
     if ext_exists(cursor, ext):
         query = "DROP EXTENSION \"%s\"" % ext
@@ -107,6 +108,7 @@ def ext_delete(cursor, ext):
     else:
         return False
 
+
 def ext_create(cursor, ext):
     if not ext_exists(cursor, ext):
         query = 'CREATE EXTENSION "%s"' % ext
@@ -119,6 +121,7 @@ def ext_create(cursor, ext):
 # Module execution.
 #
 
+
 def main():
     module = AnsibleModule(
         argument_spec=dict(
@@ -130,7 +133,7 @@ def main():
             ext=dict(required=True, aliases=['name']),
             state=dict(default="present", choices=["absent", "present"]),
         ),
-        supports_check_mode = True
+        supports_check_mode=True
     )
 
     if not postgresqldb_found:
@@ -145,13 +148,13 @@ def main():
     # check which values are empty and don't include in the **kw
     # dictionary
     params_map = {
-        "login_host":"host",
-        "login_user":"user",
-        "login_password":"password",
-        "port":"port"
+        "login_host": "host",
+        "login_user": "user",
+        "login_password": "password",
+        "port": "port"
     }
-    kw = dict( (params_map[k], v) for (k, v) in module.params.items()
-              if k in params_map and v != '' )
+    kw = dict((params_map[k], v) for (k, v) in module.params.items()
+              if k in params_map and v != '')
     try:
         db_connection = psycopg2.connect(database=db, **kw)
         # Enable autocommit so we can create databases