do dbQUeue.stop in logTerm so we don't have to have an extra line in every executable

src/zm_logger.cpp

@@ -570,6 +570,7 @@ void logInit(const char *name, const Logger::Options &options) {
 }
 
 void logTerm() {
+  dbQueue.stop();
   if (Logger::smInstance) {
     delete Logger::smInstance;
     Logger::smInstance = nullptr;

src/zmc.cpp

@@ -378,7 +378,6 @@ int main(int argc, char *argv[]) {
   }
 
   Image::Deinitialise();
-  dbQueue.stop();
   Debug(1, "terminating");
   logTerm();
   zmDbClose();