This change adds support for Artifactory Trigger. [0]
In order to use this trigger in JJB Templates, Artifactory
Instances the jobs are polling the paths from must be configured
on Jenkins Global Configuration in advance.
[0] https://plugins.jenkins.io/artifactory/
Change-Id: I7b4651c54c5d4dc14916d58ab6c7d6c7e1e8d4c5