FTS-1666: Treat params::job_metadata correctly when it is already a dictionary

1 job for develop in 24 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed build #11681870
docker-image-build

00:00:24

 
Name Stage Failure
failed
build Build
Public key for libtommath-0.42.0-6.el7.x86_64.rpm is not installed


Error downloading packages:
gfal2-2.19.0-r2101041041.el7.x86_64: [Errno 256] No more mirrors to try.

time="2021-01-18T19:07:20Z" 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"
Cleaning up file based variables
ERROR: Job failed: exit code 1