Add an assert to QueueMessageSequencialAndDuplicateTestCase
Add Clustering Integrations tests

OrderGuaranteeTestCase - tests ordered delivery
SubscriptionDisconnectingTestCase - subscription disconnecting and reconnecting tests
MultipleSubscriberMultiplePublisherTestCase - tests broker with multiple publisher and subscribers
DifferentRateSubscriberTestCase - tests subscribers/publishers with different rates
Merge pull request #47 from a5anka/platform_integration_tests

Clustered platform integration tests