turn AppQueryResponse into GenericResponse
turn AppQueryResponse into GenericResponse

so far there's nothing particularly Appy about it

Signed-off-by: Johannes Tuchscherer <03515920f4f16d28ce14ee36c264bf06f10fec0b@pivotallabs.com>

nttlabs/cf-test-helpers,nttlabs/cf-test-helpers,cloudfoundry-incubator/cf-test-helpers,cloudfoundry-incubator/cf-test-helpers