Changes port for SimpleFetchingTikaStage wiremock to be a less common one

The WireMock in SimpleFetchingTikaStageTest used the default port of 8080. This fails the test when run in environments that have a Tomcat running, such as build servers running Jenkins.

Chose a high port number that probably isn't as used. It would probably be better to choose a random open port, but WireMock seems to lack that feature. Perhaps a Rule can be made that does the check, extending the WireMockRule.

This is at least a temporary solution to get the test to run.