Changes to support grails-datastore-gorm build snapshot 3.1.3

grails-datastore-gorm.3.1.2 and 3.1.1 has a bug associated with missing version property for domain grails/java classes. This datastore-gorm bug caused sessionFactory errors or NPEs when used with hibernate-Envers as well. This issue was fixed in grails-datastore-gorm 3.1.3.build-snapshot, this pull request (snapshot) modifies the hibenate4-plugin depencies in BuildCconfig to use grails-datastore-gorm 3.1.3.build-snapshot.