ISPN-3161 ClusterFileCacheStoreFunctionalTest.testRestoreTransactionalAtomicMap fails intermittently

https://issues.jboss.org/browse/ISPN-3161

The problem was the evict() is invoked but the ```TxCompletionNotificationCommand``` was not deliver yet (and the lock is still on) 

I took this change to update the test to use the ```assertEquals()``` stuff and the new Configuration.