split away a unit test for LiteralInput integer
split away a unit test for LiteralInput integer

doclements/pywps-4,jonas-eberle/pywps,bird-house/PyWPS,tomkralidis/pywps,ldesousa/PyWPS,jachym/PyWPS,SiggyF/pywps-4,geopython/pywps,ricardogsilva/PyWPS