Add tablets tests for every statement possible (#510)

We need to test every possible statement for tablet flow, that makes
sure:
1. That tablet into reported by server
2. Tablet information on Cluster is being updated
3. Statement is routed properly according to tablet info

Author: dkropachev

Diff for: driver-core/src/test/java/com/datastax/driver/core/CCMTestsSupport.java

@@ -1043,6 +1043,12 @@ protected void initTestSession() throws Exception {
       session = register(cluster.connect());
   }
 
+  public Session newSession() {
+    if (ccmTestConfig.createCcm() && ccmTestConfig.createCluster() && ccmTestConfig.createSession())
+      return register(cluster.connect());
+    return null;
+  }
+
   protected void initTestKeyspace() {
     if (ccmTestConfig.createCcm()
         && ccmTestConfig.createCluster()