(maint) improved error logging on vm_control.rb failure
Merge pull request #456 from anodelman/better-error-logging

(maint) improved error logging on vm_control.rb failure
push error handling into utils/vm_control
push the raised exception up the chain
push exit code from system call up through systest.rb
Merge pull request #457 from anodelman/red-on-fail

(#20930) fix jenkins green on failure bug
Merge branch 'master' into ntpdate-lib

Conflicts:
	lib/puppet_acceptance/cli.rb
	lib/puppet_acceptance/utils/vm_control.rb