Updating trunk versions to 4.2.0-SNAPSHOT

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@170259 a5903396-d722-0410-b921-86c7d4935375
Updating trunk versions to 4.2.0-SNAPSHOT

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@170260 a5903396-d722-0410-b921-86c7d4935375