[CASSANDRA-637] Re-enable seed node replace test (#1350)

* Revert [INFINITY-2038] Support data_center and rack configuration in Cassandra #1303

* [CASSANDRA-637] Re-enable seed node replace test

Author: gabrielhartmann

frameworks/cassandra/tests/test_recovery.py

@@ -50,7 +50,6 @@ def test_node_replace_replaces_node():
 
 @pytest.mark.sanity
 @sdk_utils.dcos_1_9_or_higher # dcos task exec not supported < 1.9
-@pytest.mark.skip(reason="CASSANDRA-637")
 def test_node_replace_replaces_seed_node():
     pod_to_replace = 'node-0'
     pod_host = get_pod_host(pod_to_replace)