Provide an out-of-the-box WaitStrategy that validates Cassandra's CqlSession is available

[snicoll]

We're using testcontainers with Cassandra and we need to make sure that the CqlSession is available as things happen asynchronously.

We ended up, with the help of the Cassandra team, with this code.

Although the local datacenter is specific, it could be a parameter of some kind maybe? Or a supplier for CqlSessionBuilder?

It looks like every ITs would need this strategy so it would be awesome if the project would provide that.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If you believe this is a mistake, please reply to this comment to keep it open. If there isn't one already, a PR to fix or at least reproduce the problem in a test case will always help us get back on track to tackle this.