Provide mode to check build durations

[CoRfr]

This adds a mode so that check-jenkins-build-time can check the build duration instead of when a build last occured.

The goal is to monitor the performance of some jobs.

Signed-off-by: Bertrand Roussel broussel@sierrawireless.com

Pull Request Checklist

Is this in reference to an existing issue?

General

• [x] Update Changelog following the conventions laid out on Our CHANGELOG Guidelines

• [x] Update README with any necessary configuration snippets

• [x] Binstubs are created if needed

• [x] RuboCop passes

• [x] Existing tests pass

New Plugins

• [ ] Tests

• [ ] Add the plugin to the README

• [ ] Does it have a complete header as outlined here

Purpose

Known Compatibility Issues

[CoRfr]

Sample result:

Passed:

$ check-jenkins-build-time.rb -u 'http://jenkins-cnt:8080/' --jobs 'Legato-Review=1h' --check-build-duration
JenkinsBuildTime OK: 1 job(s) had successful builds within allowed times

Failed:

$ check-jenkins-build-time.rb -u 'http://jenkins-cnt:8080/' --jobs 'Legato-Review=30m' --check-build-duration
JenkinsBuildTime CRITICAL: 1 failure(s): Legato-Review: last built at 2018-05-10 01:47:18 +0000 (33 mins 41 secs) exceeded max duration = 30m

[majormoses]

released: https://rubygems.org/gems/sensu-plugins-jenkins/versions/1.7.0