[dev] Created a new test ("Request Namespace") in `client-test.js` which tests if the namespaces are set correctly if a request is invoked and if the names of the `complexTypes` are set according to the `wsdl`-definition.  Also added three testfiles (`child_namespace.wsdl`, `certificate_namespace.xsd`, `common_namespace.xsd`) for the corresponding test.
[dev] Added three testfiles (`child_namespace.wsdl`, `certificate_namespace.xsd`, `common_namespace.xsd`) for the test `Request Namespace` in `client-test.js`.