mysql_user: fix parsing privs when a user has roles assigned to it

plugins/modules/mysql_user.py

@@ -750,8 +750,19 @@ def privileges_get(cursor, user, host):
 
     for grant in grants:
         res = re.match("""GRANT (.+) ON (.+) TO (['`"]).*\\3@(['`"]).*\\4( IDENTIFIED BY PASSWORD (['`"]).+\\6)? ?(.*)""", grant[0])
+
         if res is None:
+            # If a user has roles assigned, we'll have one of priv tuples looking like
+            # GRANT `admin`@`%` TO `user1`@`localhost`
+            # which will result None as res value.
+            # As we use the mysql_role module (community.mysql 2.0.0+) to manipulate roles
+            # we just ignore such privs below:
+            res = re.match("""GRANT (.+) TO (['`"]).*""", grant[0])
+            if res:
+                continue
+
             raise InvalidPrivsError('unable to parse the MySQL grant string: %s' % grant[0])
+
         privileges = res.group(1).split(",")
         privileges = [pick(x.strip()) for x in privileges]