Add more info about the version-under-test.
Add more info about the version-under-test.

Problem:
- Results folder name generated by "make systest" does not convey any
  tag information about the version-under-test.

Solution:
- Instead of using the full commit ID in the results folder name, use
  the tag and abbreviated commit ID from "git describe".

michaeldayreads/marathon-bigip-ctlr,michaeldayreads/marathon-bigip-ctlr,michaeldayreads/marathon-bigip-ctlr