Added dependencies (testCompile) testNG
Added test HoldsLastInsertedPropertyUnderKey
Added test removesPropertyIdentifiedByKey
Added test holdsLastInsertedParameterUnderKey
Added test removesParameterIdentifiedByKey
Added test convertsParametersOfHttpPostString
Added test holdRequestMethod
Added test holdRequestUrl
Added test holdRequestUrl
Added test recognizesGetUrlParametersAndExtracts
Added test recognizesGetUrlParametersAndExtracts
Implements Request class
Use TestNG