Adding a hook to the synaspe env that can inject carbon tenant info to the thread local carbon context.

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@181308 a5903396-d722-0410-b921-86c7d4935375
Adding the impl of carbon tenant info configurator.

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@181309 a5903396-d722-0410-b921-86c7d4935375