 update version to 6.0 for master branch
 update version to 6.0 for master branch

atul-alpine/chorus,jamesblunt/chorus,atul-alpine/chorus,atul-alpine/chorus,hewtest/chorus,hewtest/chorus,atul-alpine/chorus,lukepolo/chorus,hewtest/chorus,hewtest/chorus,lukepolo/chorus,prakash-alpine/chorus,jamesblunt/chorus,lukepolo/chorus,atul-alpine/chorus,prakash-alpine/chorus,atul-alpine/chorus,prakash-alpine/chorus,hewtest/chorus,lukepolo/chorus,hewtest/chorus,hewtest/chorus,jamesblunt/chorus,prakash-alpine/chorus,lukepolo/chorus,hewtest/chorus,jamesblunt/chorus,lukepolo/chorus,lukepolo/chorus,jamesblunt/chorus,jamesblunt/chorus,atul-alpine/chorus,jamesblunt/chorus,prakash-alpine/chorus