recovering
recover gouroutines
previos order of defer
description changed
r -> err
fixes while testing
Fix recover() for agent cmd handler.  Tweak the error message wording.  Add recover() in a couple more places.
Recover main agent goroutine.
Fix a qan test because err msg wording changed.
Merge pull request #80 from percona/PCT-595--recovering-goroutines

 PCT-595--recovering-goroutines