also use skipTests in addition to skip to really skip tests in default test phase for selenium.test

Change-Id: I3b020bfbbbb06fee93b67e0531febb3c6cba2787

java/com.sap.sailing.selenium.test/pom.xml

@@ -53,6 +53,7 @@
         <artifactId>tycho-surefire-plugin</artifactId>
         <configuration>
           <!-- Skip the normal tests, we'll run them in the integration-test phase -->
+          <skipTests>true</skipTests>
           <skip>true</skip>
         </configuration>