Specify bundler 1.17 for ruby 2.1 and 2.2
Use an older bundler as Bundler 2 does not support ruby < 2.3
This failure is visible in https://gitlab.com/gitlab-org/gitlab-shell/-/jobs/141454510 for !270 (merged)
Use an older bundler as Bundler 2 does not support ruby < 2.3
This failure is visible in https://gitlab.com/gitlab-org/gitlab-shell/-/jobs/141454510 for !270 (merged)