Removing unused transport adaptor manager and event builder stubs

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180196 a5903396-d722-0410-b921-86c7d4935375
Adding input transport adaptor manager stub

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180197 a5903396-d722-0410-b921-86c7d4935375
Adding output transport adaptor manager stub

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180198 a5903396-d722-0410-b921-86c7d4935375