improve code quality of bridgedescs module
The code quality of bridgedescs module should be improved using the reports generated by Findbugs and PMD.
Intended results:
- increase test coverage of
org.torproject.collector.bridgedescs
to something reasonably close to 100% - add ant tasks for both
- define the set of rules that will be used for all java projects
- improve code quality of the bridgedescs module based on the reports