Merge branch 'FTS-1670' into 'develop'

Add wlcg.groups scope when exchanging a token

Closes FTS-1670

See merge request !44
2 jobs for develop in 24 seconds (queued for 3 seconds)
Name Stage Failure
build Build

Error downloading packages:
python-fts-3.10.0-r2009101948.el7.noarch: [Errno 256] No more mirrors to try.
fts-rest-selinux-3.10.0-r2009101948.el7.noarch: [Errno 256] No more mirrors to try.
fts-rest-3.10.0-r2009101948.el7.noarch: [Errno 256] No more mirrors to try.

time="2020-09-17T14:41:08Z" level=fatal msg="The command '/bin/sh -c /usr/bin/yum install -y fts-rest-selinux fts-rest httpd MySQL-python' returned a non-zero code: 1"
ERROR: Job failed: exit code 1