ClusteredCacheConfigurationIT.testQueueFlushIntervalMemcached always fails

Since the ISPN-5857 fix, ClusteredCacheConfigurationIT.testQueueFlushIntervalMemcached always fails.

The problem is that the "k1" key no longer has node 1 as the primary owner. Because replication between the primary (node 2) and the backup (node 1) is asynchronous, a get after a put on node 1 almost never finds the value.

The simple fix would be to swap the roles of node 1 and node 2 in the test.