Partly revert "tests: adjust DCExecutionProfileTests constructor"

This partly reverts commit 6b44c2c.
This is because now we support `used_hosts_per_remote_dc` correctly,
which means we forbid DC failover in the case of
`used_hosts_per_remote_dc = 0`. This makes the test fail, because it
originally had that parameter set to 1. The reverted commit changed it
to `0`, because `0` was the only accepted parameter at that time.

Author: wprzytula

tests/src/integration/tests/test_exec_profile.cpp

@@ -193,15 +193,15 @@ class DCExecutionProfileTest : public ExecutionProfileTest {
   void SetUp() {
     // Create the execution profiles for the test cases
     profiles_["dc_aware"] = ExecutionProfile::build()
-                                .with_load_balance_dc_aware("dc1", 0, false)
+                                .with_load_balance_dc_aware("dc1", 1, false)
                                 .with_consistency(CASS_CONSISTENCY_LOCAL_ONE);
     profiles_["blacklist_dc"] = ExecutionProfile::build()
                                     .with_blacklist_dc_filtering("dc1")
-                                    .with_load_balance_dc_aware("dc1", 0, false)
+                                    .with_load_balance_dc_aware("dc1", 1, false)
                                     .with_consistency(CASS_CONSISTENCY_LOCAL_ONE);
     profiles_["whitelist_dc"] = ExecutionProfile::build()
                                     .with_whitelist_dc_filtering("dc2")
-                                    .with_load_balance_dc_aware("dc1", 0, false)
+                                    .with_load_balance_dc_aware("dc1", 1, false)
                                     .with_consistency(CASS_CONSISTENCY_LOCAL_ONE);
 
     // Call the parent setup function