Updating trunk versions to 4.2.0-SNAPSHOT

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@170263 a5903396-d722-0410-b921-86c7d4935375
Fixing axis2 version

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@170265 a5903396-d722-0410-b921-86c7d4935375