Tika: Upgrades junit to 4.11 and mockito to 1.9.5
Tika: Settings which are set by external means should be declared public

Eventhough reflection is used to set these fields, the intention
should be clearly stated in the code that others will reach
into this class and modify the values.
Tika: Fixes warnings in tests and cleans up some code
Tika fetch stage now closes its opened resources.
Merge pull request #233 from Nycander/tika-fetch-close-resources

SimpleFetchingTikaStage should close its resources after fetching