fix package of DerbyDialect

Author: gavinking

local-build-plugins/src/main/groovy/local.databases.gradle

@@ -34,7 +34,7 @@ ext {
                     'connection.init_sql' : ''
             ],
             derby : [
-                    'db.dialect' : 'org.hibernate.dialect.DerbyDialect',
+                    'db.dialect' : 'org.hibernate.community.dialect.DerbyDialect',
                     'jdbc.driver': 'org.apache.derby.iapi.jdbc.AutoloadedDriver',
                     'jdbc.user'  : 'hibernate_orm_test',
                     'jdbc.pass'  : 'hibernate_orm_test',