Disable hard-coded HeapLeakChecker::Disabler

In CI, we would like to run contrail unit tests without using gperftools.
Only this test does not buld due to hard coded usage of HeapLeakChecker::Disabler

Change-Id: Ie5c734f02ce0790f36906e54a287c62d1ceeaef5
Closes-Bug: 1596630

src/query_engine/rac_alloc_test.cc

@@ -3,9 +3,6 @@
  */
 
 #include "../analytics/redis_connection.h"
-#ifndef __APPLE__
-#include "gperftools/heap-checker.h"
-#endif
 
 RedisAsyncConnection * rac_alloc(EventManager *evm, const std::string & redis_ip,
             unsigned short redis_port,
@@ -21,9 +18,6 @@ RedisAsyncConnection * rac_alloc_nocheck(EventManager *evm, const std::string &
             unsigned short redis_port,
             RedisAsyncConnection::ClientConnectCbFn client_connect_cb,
             RedisAsyncConnection::ClientDisconnectCbFn client_disconnect_cb) {
-#ifndef __APPLE__
-    HeapLeakChecker::Disabler disabler;
-#endif
     RedisAsyncConnection * rac =
             new RedisAsyncConnection( evm, redis_ip, redis_port,
         client_connect_cb, client_disconnect_cb);