code: @Then("^a Cassandra keyspace '(.+?)' exists$")
      public void assertKeyspaceOnCassandraExists(String keyspace) {
          assertThat(commonspec.getCassandraClient().getKeyspaces()).as("The keyspace " + keyspace + " exists on cassandra").contains(keyspace);
      }
docs: Checks if a keyspaces exists in Cassandra.
  
  @param keyspace