Disable ATH and PCT tests in Jenkinsfile
Disable ATH and PCT tests in Jenkinsfile

The tests from the acceptance test harness and plugin compatibility
tests are not reliable enough on either the ci.jenkins.io
infrastructure or on the infrastructure that I host.  Rather than
spend time ignoring test failures and stash/unstash failures, I'm
disabling these tests.

MarkEWaite/git-plugin,martinda/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,v1v/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,v1v/git-plugin,v1v/git-plugin