Set default environment when registering to Satellite 6

https://bugzilla.redhat.com/show_bug.cgi?id=1164032
Cool @brandondunne, I checked out this PR with 0.9.3 installed and it did the right thing.

Which is clearer: 
`"<1", ">=0.9.4"` 
or
`">=0.9.4", "<1"`

Both ways worked for me locally.