Added logging an error status code when stream manager can not connect to tmaster (#3208)

diff --git a/heron/stmgr/src/cpp/manager/tmaster-client.cpp b/heron/stmgr/src/cpp/manager/tmaster-client.cpp
index b4f2c7b..3046ba5 100644
--- a/heron/stmgr/src/cpp/manager/tmaster-client.cpp
+++ b/heron/stmgr/src/cpp/manager/tmaster-client.cpp
@@ -116,7 +116,7 @@
       return;
     }
     LOG(ERROR) << "Could not connect to tmaster at " << get_clientoptions().get_host() << ":"
-               << get_clientoptions().get_port() << std::endl;
+               << get_clientoptions().get_port() << ", Status code: " << _status << std::endl;
     LOG(INFO) << "Will retry again..." << std::endl;
     // Shouldn't be in a state where a previous timer is not cleared yet.
     if (reconnect_timer_id == 0) {