Fixes typo in ImportPlugin
Merging with @freifunk/query.api.freifunk.net/master

Upstream changes:
- removed unused dm4-folder
- integrated jackson
- added some schema parser testfile

Changes:
- Fixed sloppy formatting
- commented ImportSchema run

Envisioned code style regarding indention:
- Tab size: 4
- Line width: 120
Adapted to run with DM 4.4-SNAPSHOT of today.
Add author info and some class description.
Fixes many-to-many relation in value-topics.
Parsing and aggregating routing name-value topics.
Introduced service method to query communities by routing name-value.

Example:
GET http://localhost:8080/freifunk-api/routing/olsrv2

Know issue:
- see comment before enrichAboutRoutingProtocolNameTopic()-calls
Fixes: many routing values stored.
Merge pull request #4 from mukil/routing-values

Routing values