introducing a new method to Abstract Endpoint which is to be used by Blocking Sender

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180077 a5903396-d722-0410-b921-86c7d4935375
Fixing xml generation when there is not underscore character. JIRA 1710

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180078 a5903396-d722-0410-b921-86c7d4935375
adding blocking sender specific synapse constants

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180079 a5903396-d722-0410-b921-86c7d4935375
Fixing lifecycle test failures, REGISTRY-1710

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180080 a5903396-d722-0410-b921-86c7d4935375