Rearrange cleanup in chroot executor.
Rearrange cleanup in chroot executor.

Cleanup should most definitely not race with the job that was spun off in a goroutine!  Chalk up yet another problem that would've been instantly detected before merge to master if only we had repeatr CI'ing repeatr right now...

Signed-off-by: Eric Myhre <2346ad27d7568ba9896f1b7da6b5991251debdf2@exultant.us>

subuser-security/repeatr,polydawn/repeatr,polydawn/repeatr,kkroening/repeatr,subuser-security/repeatr,kkroening/repeatr