-Ran full clean install on OS X (10.14.2)
-Tested secure and unsecure Registry instances: creating/editing users, creating/editing buckets, deleting flows
-Performed basic integration testing a with secured NiFi instance (1.9.2): adding registry clients, placing a process group under version control, saving different versions, changing versions, importing a version, stopping version control
+1 (non-binding) Release this package as nifi-registry-0.4.0
Ran through the release helper guide...
* Built with a clean local maven repository
* Ran the binary, everything running well.
* Ran TestRestAPI.java to exercise the API.
* UI testing, no issues found.