Remove inMemoryMessageStore references from MessagingEngine.
Merge pull request #89 from akalankapagoda/RemoveInMemMsgStore

Remove inMemoryMessageStore references from MessagingEngine.
improving message stores
Merge pull request #91 from abeykoon/improve_messageStores

improving message stores
ORDER BY clause added to PS_SELECT_METADATA_RANGE_FROM_QUEUE and PS_SELECT_METADATA_FROM_QUEUE queries.
Merge pull request #96 from indikasampath2000/master

ORDER BY clause added to PS_SELECT_METADATA_RANGE_FROM_QUEUE and PS_SELE...
Update pom.xml
Changes did after profiling
changed test class
profile test changes
profile testing changes
changed DisruptorBasedExecutor - removed ring buffer executor
cassandra issue testing code
changed alternating message writer for testing