Fix user_alter in postgresql_user

Author: quixoten

database/postgresql/postgresql_user.py

@@ -218,7 +218,7 @@ def user_alter(cursor, module, user, password, role_attr_flags, encrypted, expir
         # Grab current role attributes.
         current_role_attrs = cursor.fetchone()
 
-        alter = ['ALTER USER "%(user)s"' % {"user": pg_quote_identifier(user, 'role')}]
+        alter = ['ALTER USER %(user)s' % {"user": pg_quote_identifier(user, 'role')}]
         if password is not None:
             alter.append("WITH %(crypt)s" % {"crypt": encrypted})
             alter.append("PASSWORD %(password)s")
@@ -229,7 +229,7 @@ def user_alter(cursor, module, user, password, role_attr_flags, encrypted, expir
             alter.append("VALID UNTIL %(expires)s")
 
         try:
-            cursor.execute(alter, query_password_data)
+            cursor.execute(' '.join(alter), query_password_data)
         except psycopg2.InternalError, e:
             if e.pgcode == '25006':
                 # Handle errors due to read-only transactions indicated by pgcode 25006