Adding api management feature to greg.

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@176721 a5903396-d722-0410-b921-86c7d4935375
update apimgt product with apimgt.core feature.

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@176722 a5903396-d722-0410-b921-86c7d4935375