change bundler config in both stage and package tasks; fix git HEAD issue [#32778305]
change bundler config in both stage and package tasks; fix git HEAD issue [#32778305]

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