ISPN-5023 Random Failues on *FactoryBeanTest in the Spring Modules

Force the test JMX domain even if the configuration was loaded from a file.

https://issues.jboss.org/browse/ISPN-5023

Was just looking from the point of view of one of random failing tests ```SpringEmbeddedCacheManagerFactoryBeanTest```, that does not get its behaviour altered by this change