[FIXED JENKINS-17576] [FIXED JENKINS-16870] support conditional buildstep plugin
Merge pull request #29 from imod/support-conditional-buildstep

[FIXED JENKINS-17576] [FIXED JENKINS-16870] support conditional buildstep plugin
moved to JUnit 4 annotations, added support for jenkins test instance and htmlunit web client
multi-scm support added to exsiting multi project
new test configs
code from multiscm plugin with changes to fit our needs
multiscm gui changes
util class
merged with master
merged with master