Add additional waits
Merge pull request #179 from joaquincasares/CASS-7012

Add additional waits
Throw meaningful error when trying to use a closed Cluster (JAVA-335 #send-to-testing).
Merge pull request #182 from olim7t/java335

JAVA-335: throw meaningful error when trying to use a closed Cluster.
Fix jenkins build 117 with additional check
Merge pull request #187 from joaquincasares/jenkins_117

Fix jenkins build 117 with additional check