[1914] Fix reply matching tests

The fake session needs to include the reply element in the response
envelope. And the is_reply flag was set to the wrong value for replies
(it was false as well).

src/lib/config/tests/ccsession_unittests.cc

@@ -749,7 +749,7 @@ protected:
     {
         return (mccs_.groupRecvMsgAsync(
             bind(&AsyncReceiveCCSessionTest::callback, this, next_flag_ ++, _1,
-                 _2, _3), false, seq));
+                 _2, _3), true, seq));
     }
     /// \brief Check the next called callback was with this flag
     void called(int flag) {

src/lib/config/tests/fake_session.cc

@@ -139,6 +139,9 @@ FakeSession::recvmsg(ConstElementPtr& env, ConstElementPtr& msg, bool nonblock,
                 ElementPtr new_env = Element::createMap();
                 new_env->set("group", c_m->get(0));
                 new_env->set("to", c_m->get(1));
+                if (c_m->get(3)->intValue() != -1) {
+                    new_env->set("reply", c_m->get(3));
+                }
                 env = new_env;
                 msg = c_m->get(2);
                 to_remove = c_m;