Added for NWFilter: NWFilterDefineXMLFromFile, NWFilterDefineXML  and appropriate test TestIntergrationDefineUndefineNWFilterXML

Adding NWFilterGetName and TestIntegrationNWFilterGetName

Adding NWFilterGetUUID , NWFilterGetUUIDString and appropriate integration tests

Adding NWFilterGetXMLDesc and TestIntegrationNWFilterGetXMLDesc

Adding LookupNWFilterByName and TestIntegrationLookupNWFilterByName

Adding LookupNWFilterByUUIDString and TestIntegrationLookupNWFilterByUUIDString