Tests have started to collide with ports that are bound by different stuff that is permanently running on the machine. For example OSM agent on azure VMs. The port allocator “should” be returning only open ports, but as noticed in: https://ci-master.corda.r3cev.com/viewLog.html?buildId=192061&buildTypeId=CordaEnterprise_Build
Running on ci-agent 23 - RaftNotaryServiceTests.detect double spend fails because of an already bound port. This also happens on agent 200 clashing with the docker proxy port.