[ROCKETMQ-189] Misleading tip on consumeTimestamp and wrong consumeTimestamp exception message closes apache/incubator-rocketmq#97

[ROCKETMQ-175] Consumer may miss messages because of inconsistent sub…  closes apache/incubator-rocketmq#92

[ROCKETMQ-161] Update runbroker.sh and runserver.sh to support user defined jvm mem flag closes apache/incubator-rocketmq#87

Thanks to StyleTang

[ROCKETMQ-187] Measure the code coverage for Integration Tests, and add sonar-apache profile, closes apache/incubator-rocketmq#96

[ROCKETMQ-107] Fix possible concurrency problem on ServiceState when consumer start/shutdown, closes apache/incubator-rocketmq#68

BugFix: WS_DOMAIN_NAME, SUBGROUP default values override custom values passed by java options options

[ROCKETMQ-76] Expose IntegrationTestBase to be used by other integration projects closes apache/incubator-rocketmq#52

Signed-off-by: Nshtykh_roman <rshtykh@yahoo.com>

Trivial Changes: Specify maven-assembly-plugin version to 2.8 for release-client profile similar to release-all profile, reason of performing this change is that latest version of maven-assembly-plugin has removed finalName property.