Update to ruby 2.1, and related changes to fix immediate failures.

[#70710962]
Upgrading to cf-uaa-lib 3.1.0.

- still pointing to Jim's fork, waiting on a PR to be accepted by UAA
- Uaa gem now needs skip_ssl_validation

[#70710962]
Upgraded all gems, except Rubocop.

[#70710962]
Update cf-uaa-lib to latest master

[#70710962]
Upgrade to ruby 2.1.2

[#70710962]