now the id token generators are pluggable

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@174740 a5903396-d722-0410-b921-86c7d4935375
now the id token generators are pluggable

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@174741 a5903396-d722-0410-b921-86c7d4935375