Merge pull request #177 from pamod/mqtt_dev

Fixing the NullPointerException issue encountered during increment/decre...
Adding wso2 pom as the parent
Merge pull request #178 from ramith/master

Adding wso2 pom as the parent
1. adding AndesContextIngormationManager to manage queues/exchanes/bindings 2. modifying message purge 3. introducing queue delete 4. Introducing orphangedMessageHandler.
added logs.
Merge pull request #179 from abeykoon/allow_multiple_subscribers_for_same_clientID

Allow multiple subscribers for same client
Remove unused properties from AndesConfiguration
Add support to apply carbon port offset to all ports coming from configuration
Merge pull request #180 from hastef88/configuration_remove_obsolete_properties

Remove unused properties from AndesConfiguration
Remove expiry data while queue purging.
Merge pull request #181 from akalankapagoda/purgeexpire

Remove expiry data while queue purging.
Remove lib jars from tracking
Merge pull request #182 from a5anka/lib_clean

Remove lib jars from tracking
fixed a bug in slot unassignment.
Ignore andes-core lib directory
Merge pull request #183 from a5anka/lib_clean

Ignore andes-core lib directory
removing unused variables. stick to underscore-less naming conventions. correct debug logs, log contextual errors.
Merge pull request #184 from abeykoon/fix_bug_in_slot_unassignement

fixed a bug in slot unassignment.
Merge pull request #185 from hastef88/peer_review_fixes_queue_purge_and_config_revamp

removing unused variables. stick to underscore-less naming conventions. correct debug logs, log contextual errors.
Updating tracker before the message was release to the wire, avoid NullPointerException due to thread switching