Revert "Use Jetty 9.4.x for vespa-hadoop unit tests"
Revert "Use Jetty 9.4.x for vespa-hadoop unit tests"

This reverts commit b625822c3a6d24c459debbe3c2e5e11372a9ab10.

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa