Add error handling to relay registration

This way we can better track whether
the pod was successfully registered

requires https://github.com/thefederationinfo/the-federation.info/pull/162
4 jobs for register_relay_error_checking in 9 minutes and 57 seconds (queued for 1 minute and 43 seconds)
latest
Status Job ID Name Coverage
  Install
passed #1399
install

00:05:46

 
  Test
passed #1401
linux:test:mysql

00:02:29

passed #1400
linux:test:psql

00:02:22

 
  Build
passed #1402
linux:amd64

00:01:39