Webservices: enhanced WsTesterTest, JAXRSToolingIntegrationTest, WebServiceTestBase

WsTesterTest: Testing also default value of Request Type.
JAXRSToolingIntegrationTest: Assert that HTTP header is present
WebServiceTestBase: Enhanced error handling

Refactored PathParamAnnotationSupportTest (removed unused import)

JBoss Tools Component: webservices
Author: rrabara