Merge pull request #1 from edquist/gums-1.4

Make gums-add-mysql-admin suitable for automated use (SOFTWARE-1577)
Fixes requested by FNAL.  In particular,

- Restore prior behavior which allowed manual group mappings to be regexp-based
- Refactor code so the string "gums-banned" is centralized in one define.
- Only allow deletions from the web interface for the default group - all other
  groups have membership defined in other places and the deletions will not do
  what the admin expects.
Update POMs for GUMS 1.4.
match xmltooling version from gums-service (SOFTWARE-1498)