set ContentType together with messageType property

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@176514 a5903396-d722-0410-b921-86c7d4935375
adding chamaths password policy configs

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@176515 a5903396-d722-0410-b921-86c7d4935375