[jboss-rpm] Changed object store in ArjunaObjectStoreEnvironmentService - not using HornetqObjectStoreAdaptor

[Marek Goldmann]

Hiya Carlo,

I removed the dependency on HornetQ store and left default using the 
fallback. This will allow us to not package HornetQ as AS7 dep right 
now. If you have any improvements, feel free to change it.

https://github.com/fedora-jboss-as/jboss-as/commit/835d31fcad8ed79070c109adf6a8760ddbfcad75

--Marek