Gerritbot should be installable via pip. To make this possible add
jobs to publish gerritbot tarballs and push gerritbot to pypi when tags
are added to gerritbot.
Change-Id: I5de346cd96a096809c9fe44d2117ebdb45a180c4
Reviewed-on: https://review.openstack.org/10910
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins