dependency clean up: remove unused org.apache.httpcomponents artifacts
remove unused commons-collections dependency
set dependencies on geoserver artifacts to 'provided' scope
fix NPE in DiffCounter
Fix race condition in osm history import.

Problem was inserting into the worktree with more than one thread at a time.
This fix is just not using multiple threads in osm history import, and improved
performance by using the bulk insert/delete methods in WorkTree instead of the
individual feature ones so that there are less root trees created and WORK_HEAD updates.
The issue with WorkTree not being thread safe remains but that's a separate one.
Add --raw option to cli log command