changing log from INFO to DEBUG

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178694 a5903396-d722-0410-b921-86c7d4935375
Fixing https://wso2.org/jira/browse/APIMANAGER-1396

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@178695 a5903396-d722-0410-b921-86c7d4935375