Refix bug 1226 after revert

This patch properly fixes bug 1226 without introducing a breaking
change to idempotency which was introduced in PR #1358

We can properly assign permissions to databases with a '.' in the name
of the database as well as assign priviliges to all databases as
specified with '*'

lib/ansible/modules/database/mysql/mysql_user.py

@@ -317,6 +317,11 @@ def privileges_unpack(priv):
     privs = []
     for item in priv.strip().split('/'):
         pieces = item.strip().split(':')
+        dbpriv = pieces[0].rsplit(".", 1)
+        # Do not escape if privilege is for database '*' (all databases)
+        if dbpriv[0].strip('`') != '*':
+            pieces[0] = "`%s`.%s" % (dbpriv[0].strip('`'), dbpriv[1])
+
         if '.' in pieces[0]:
             pieces[0] = pieces[0].split('.')
             for idx, piece in enumerate(pieces):