Explicitly specify getConfig() method owner.

If not specified, in grails 2.4.3 static namedQueries tries to invoke it from Hibernate class and throws groovy.lang.MissingMethodException: No signature of method: grails.orm.HibernateCriteriaBuilder.getConfig() is applicable for argument types: () values: []
Merge pull request #1 from dbrazhnikov/master

Explicitly specify getConfig() method owner.