[portsyncd]: Add default catch block in portsyncd (#1033)

* Add default catch block in portsyncd
* Updated error message with the right spelling
* Update try block to throw exception of type runtime_error
* Remove additional paranthesis in throw statement

Author: SuvarnaMeenakshi

portsyncd/portsyncd.cpp

@@ -163,9 +163,15 @@ int main(int argc, char **argv)
     }
     catch (const std::exception& e)
     {
-        cerr << "Exception \"" << e.what() << "\" had been thrown in deamon" << endl;
+        cerr << "Exception \"" << e.what() << "\" was thrown in daemon" << endl;
         return EXIT_FAILURE;
     }
+    catch (...)
+    {
+        cerr << "Exception was thrown in daemon" << endl;
+        return EXIT_FAILURE;
+    }
+
 
     return 1;
 }
@@ -224,7 +230,7 @@ void handlePortConfigFile(ProducerStateTable &p, string file, bool warm)
     if (!infile.is_open())
     {
         usage();
-        throw "Port configuration file not found!";
+	throw runtime_error("Port configuration file not found!");
     }
 
     list<string> header = {"name", "lanes", "alias", "speed", "autoneg", "fec"};