proposal to allow additional people to release jjb

This is a proposal to allow users other than openstack-infra-core to
make jenkins job builder releases.

I'm proposing that we create a new group, jenkins-job-builder-ptl
that would include openstack-infra-core with additional users that can
generate jjb releases.  I'm also proposing that infra-core add me to the
jenkins-job-builder-ptl group.

Change-Id: I5e5bfeb9c23329b6fa32b9f379602f95ccd76e65
Merge "proposal to allow additional people to release jjb"