improve descriptions on roles
improve error message if missing config
fix unit tests by allowing test jig to take over other jigs and then being tolerant of the resulting minor errors
remove log protections because I found root cause of issue (and fixed it)
Merge pull request #771 from cloudedge/pull-req-master-49bb3a6e7c547e86059972236176f307d83b19a8

https://github.com/crowbar/barclamp-crowbar/pull/771

Merged by devtool for VictorLowther