Clean test cache on tearing down ApiTestCase
Move key details handler to 'upper' handler (re heynemann/holmes-web#25)
TestReview: removing unnecessary import
Fixing JsonType: Unicode type received non-unicode bind param value
Remove old reviews (Fix #80)

Created number_of_facts in ReviewFactory
Refactoring ping api method

Replacing 'replace' statement with 'on duplicate key'
Replacing 'MAX_OLD_REVIEWS' with 'NUMBER_OF_REVIEWS_TO_KEEP'
Set correct url of test
Remove the surplus of calls