Extract db path variable from call

This makes it easier to print it if needed.

Change-Id: I297cca1d5a1091c2105005240014deda64da8742
Fix typo in member name

Change-Id: I7655df87edb8f6f91fb39a402a87f54fbc29bb9f
Add some system level testing of the service

This includes a git repo in the test data along with JSON files
with recorded Gerrit events in them. Both the SSH and LDAP connections
are mocked for testing, though the sqlite is not.

Change-Id: I0ba97d98592b036f48c361a8d6dd88dc3bd152ab