Github user ahgittin commented on the issue:
https://github.com/apache/brooklyn-server/pull/560
also, this line
```
2017-02-18 02:00:01,345 DEBUG o.a.b.c.m.p.FileBasedObjectStore [main]:
Persistence mode AUTO, directory
/home/jenkins/jenkins-slave/workspace/brooklyn-server-pull-requests%402/launcher/target/test-classes/orphaned-locations-test-data/data-with-orphaned-locations,
no previous state
```
appears only in the failed run, and code confirms it should be logged iff
the dir is empty / non-existant. so how is the dir being wiped?!
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