BUG-12023 #1: change in error text broke TestFailureThreshold: fixed and tightened expected exception
BUG-12023 #1: change in BUG-11353 broke TestKilledAM when entry point to AM changed
BUG-12023 #1: change in BUG-11254 broke TestDestroyMasterlessAM as exit code on a cluster already existing changed
BUG-12023 #1: change in error code broke TestRecreateMasterlessAM
BUG-9938 tweaks were triggering a different exception, when fixing that noticed that the non-exception-raising path didnt assert, added that. Also: better diagnostics on an exception mismatch -the exception is logged.
Merge branch 'feature/BUG-12023' into develop