fix gumballs bug by readding target to session
fix gumballs bug by readding target to session

Issues:
Fixes #413

Problem: I introduced a bug by removing the "make target name" from
the TEST_SESSION name.  This caused tests to collide across cloud-type
and device type in autolog results, which broke gumballs.

Analysis: readding the target name fixes the issue

richbrowne/f5-openstack-lbaasv2-driver,F5Networks/f5-openstack-lbaasv2-driver,mattgreene/f5-openstack-lbaasv2-driver,jputrino/f5-openstack-lbaasv2-driver,jputrino/f5-openstack-lbaasv2-driver,mattgreene/f5-openstack-lbaasv2-driver,richbrowne/f5-openstack-lbaasv2-driver,jlongstaf/f5-openstack-lbaasv2-driver,F5Networks/f5-openstack-lbaasv2-driver,jlongstaf/f5-openstack-lbaasv2-driver