* Check for validity before concluding retrieving chunk

* Removed leftover code

* removed draft comment

* Fix Retrieve test with Fake Validator function

* GoFmt

* Remove second validation

* Retrieve and netstore validation and test fixes

* Content mock validator

* Validator mock configurable return

* Fix retrieval validity check before crediting

* Removed empty comment

* Change name for ChunkValidator & ChunkValidators -> Validator & ChunkValidator

* Remove whitespace