Update api-manager.xml with StartupPublisher configuration

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180823 a5903396-d722-0410-b921-86c7d4935375
adding self registration functionality

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180825 a5903396-d722-0410-b921-86c7d4935375
getting app version RXTs from tenant's registry

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@180826 a5903396-d722-0410-b921-86c7d4935375