Failed: ServiceTestSpec, Failed to bind port (cassandra)

[seglo]

Lagom 1.5 cron build

Identified as a flakey test spec in #1797

https://travis-ci.com/github/lagom/lagom/jobs/347038859#L4436

Exception (java.lang.IllegalStateException) encountered during startup: Failed to bind port 46881 on 127.0.0.1.
	at org.apache.cassandra.transport.Server.start(Server.java:160)
	at java.util.Collections$SingletonSet.forEach(Collections.java:4769)
	at org.apache.cassandra.service.NativeTransportService.start(NativeTransportService.java:130)
	at org.apache.cassandra.service.CassandraDaemon.startNativeTransport(CassandraDaemon.java:655)
	at org.apache.cassandra.service.CassandraDaemon.start(CassandraDaemon.java:519)
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:617)
	at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:691)