Fix mysql_users failing for SLES

Author: rahuls2997

lib/puppet/provider/mysql_user/mysql.rb

@@ -8,7 +8,8 @@
   # Build a property_hash containing all the discovered information about MySQL
   # users.
   def self.instances
-    users = mysql_caller("SELECT CONCAT(User, '@',Host) AS User FROM mysql.user", 'regular').split("\n")
+    users = mysql_caller("SELECT HOST, CONCAT(User, '@',Host) AS User FROM mysql.user where HOST IS NOT NULL AND HOST != ''", 'regular').split("\n")
+    # users = users_full.reject { |user| user == 'PUBLIC@' }
     # To reduce the number of calls to MySQL we collect all the properties in
     # one big swoop.
     users.map do |name|