module-xml: SoapHandler returns invalid XML messages with some faults

[davidnich]

namespace declarations are missing

PARSE-XML-EXCEPTION: Namespace prefix soapenv on Envelope is not defined
	>> 	  parse_xml() called at /home/david/src/qore/git/module-xml/qlib/WSDL.qm:532 (Qore builtin code)
	>> 	  WSDLLib::parseSOAPMessage() called at /home/david/src/qore/git/module-xml/qlib/SoapClient.qm:538 (Qore user code)
	>> 	  SoapClient::makeCallIntern() called at /home/david/src/qore/git/module-xml/qlib/SoapClient.qm:370 (Qore user code)
	>> 	  SoapClient::callOperation() called at <builtin>:-1 (Qore user code)
	>> 	  call_function_args() called at /home/david/src/Qorus/current/qlib/QUnit.qm:1727 (Qore builtin code)
	>> 	  Test::assertThrows() called at /home/david/src/Qorus/current/qlib/QUnit.qm:1750 (Qore user code)
	>> 	  Test::assertThrows() called at ../test/SoapClient.qtest:245 (Qore user code)
	>> 	  SoapClientTest::soapClientTest() called at <builtin>:-1 (Qore user code)
	>> 	  call_function_args() called at /home/david/src/Qorus/current/qlib/QUnit.qm:505 (Qore builtin code)
	>> 	  TestCase::run() called at /home/david/src/Qorus/current/qlib/QUnit.qm:2081 (Qore user code)
	>> 	  Test::main() called at ../test/SoapClient.qtest:200 (Qore user code)
	>> 	  SoapClientTest::constructor() called at <builtin>:-1 (Qore user code)"