Add TAP test result handling ability

Add support for using org.tap4j.plugin.TapPublisher as a publisher "tap"

See https://wiki.jenkins-ci.org/display/JENKINS/TAP+Plugin for the
plugin in question

Change-Id: Iddbd96715830ecc761384963fecfe3cd5ec3c115
Reviewed-on: https://review.openstack.org/34974
Reviewed-by: Khai Do <zaro0508@gmail.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins