[rvm] use ruby "2.1", https://github.com/travis-ci/travis-ci/issues/2220
Merge pull request #570 from portertech/rvm

RVM use ruby "2.1", https://github.com/travis-ci/travis-ci/issues/2220
[wmi-metrics] first pass at a wmi metrics check extension (windows \o/)
[wmi-metrics] i broke my no caps in log line message rule