Merge pull request #3988 from cinquo/master

Adding support of job-file metadata resource with first GET implementation
Add new jobmetadata resource to the rest and implement put. CAF-146, CAF-148
Merge pull request #3989 from mmascher/jobmetadata

Add new jobmetadata resource to the rest and implement put. CAF-146, CAF...
First integration of UI-less myproxy client into rest