adding SSOService.AttributeStatementBuilder to make the attribute builder configurable

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@174744 a5903396-d722-0410-b921-86c7d4935375
adding attribute builder configs

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@174745 a5903396-d722-0410-b921-86c7d4935375
making saml sso attribute builders pluggable

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@174746 a5903396-d722-0410-b921-86c7d4935375