smo::Mind instance now global; track & manage JOLT state in Mind

We moved the instance of smo::Mind to global scope. I suppose we'll
only support one instance of Mind per SMO process at least for now.

We now track the state of Mind threads' JOLT-waiting. This allows us
to centralize the Mind thread shutdown logic. Mind::finalizeReq()
now takes care of all Mind thread shutdown state logic by tracking
whether Mind threads need to be JOLTed first before being told to
exit.

smocore/marionette/marionette.cpp

@@ -57,29 +57,15 @@ void ComponentThread::marionetteMain(ComponentThread& self)
 			/* We could make RAII guard classes to always shutdown the mind
 			 * threads properly in these pre-event loop situations.
 			 */
-			self.getIoService().post([&options]()
-			{
-				ComponentThread::joltAllMindThreadsReq(
-				[&options]()
-				{
-					ComponentThread::exitAllMindThreadsReq(
-						[&options]()
-						{
-							std::cout << __func__ << ": " << options.getUsage()
-								<< '\n';
-							mrntt::mrntt->getIoService().stop();
-						}
-					);
-				});
+			mind.finalizeReq([]{
+				mrntt::mrntt->getIoService().stop();
 			});
 			self.getIoService().reset();
 			self.getIoService().run();
 			return;
 		}
 
-		smo::Mind mind;
-
-		self.getIoService().post([&mind]()
+		self.getIoService().post([]()
 		{
 			try {
 				initializeSalmanoff();
@@ -128,7 +114,7 @@ void ComponentThread::marionetteMain(ComponentThread& self)
         }
 
         std::cout << __func__ << ": Exited event loop" << "\n";
-		mind.finalize();
+		mind.finalizeReq(nullptr);
 		shutdownSalmanoff();
 	}
 	catch (const std::exception& e)