NXDRIVE-438: Update set proxy in manager to return empty string
NXDRIVE-438: Update set proxy in manager to return empty string

arameshkumar/base-nuxeo-drive,rsoumyassdi/nuxeo-drive,rsoumyassdi/nuxeo-drive,arameshkumar/base-nuxeo-drive,arameshkumar/nuxeo-drive,arameshkumar/nuxeo-drive,ssdi-drive/nuxeo-drive,arameshkumar/nuxeo-drive,arameshkumar/base-nuxeo-drive,ssdi-drive/nuxeo-drive,ssdi-drive/nuxeo-drive,rsoumyassdi/nuxeo-drive,rsoumyassdi/nuxeo-drive,arameshkumar/nuxeo-drive,arameshkumar/base-nuxeo-drive