Add JNA as test dependency to fix tests on OpenJDK 7
Update jenkins dependencies

(1) Update org.jenkins-ci.plugins:plugins (1.505 -> 1.509.2 (LTS))
(2) Update org.jenkins-ci.tools:maven-hpi-plugin (1.78 -> 1.96)
ignore .ruby-version
Fix broken tests of jpi
Disabled cli tests on JRuby because it's broken on JRuby (it's ok on CRuby).
Fix RSpec's deprecation warnings
Disable test with jruby-18mode since Ruby 1.8 has been deprecated
Enable Maven tests on travis-ci.org
Use repo.jenkins-ci.org for Maven dependencies
Setup <repositories /> for pom.xml of ruby-runtime-parent
Make `language` singular to fix travis build of JRuby.
Merge pull request #87 from jenkinsci/fix-travis-build

Fix tests on travis-ci.org
[FIXED  JENKINS-18528]

- load plugin scripts via classpath if available (jenkins (>= 1.519))
- refactor private interfaces