Update Kitchen test suites and Travis settings
diff --git a/tests/pillar/repo_cassandra.sls b/tests/pillar/repo_cassandra.sls
index 8ece8a8..d6c454d 100644
--- a/tests/pillar/repo_cassandra.sls
+++ b/tests/pillar/repo_cassandra.sls
@@ -1,9 +1,10 @@
 linux:
   system:
+    enabled: true
     repo:
       cassandra-21x:
         source: "deb [arch=amd64] http://www.apache.org/dist/cassandra/debian 21x main"
         architectures: amd64
-        key_server: pool.sks-keyservers.net
+        key_server: hkp://p80.pool.sks-keyservers.net:80
         key_id: A278B781FE4B2BDA