Bugfix/special event read property write property (#1291)

* Fixed special-event to print priority for the RP and RPM and EPICS example apps.

* Improved error message for tag value parsing in WP example app.

* Added BACnet property array parsing function to handle property string name in RPM example app.

* Added unit test to validate BACnet special event with multiple time-value pairs

src/bacnet/bacapp.c

@@ -3613,7 +3613,7 @@ static int bacapp_snprintf_special_event(
     }
     slen = bacapp_snprintf_daily_schedule(str, str_len, &value->timeValues);
     ret_val += bacapp_snprintf_shift(slen, &str, &str_len);
-    slen = bacapp_snprintf(str, str_len, "}");
+    slen = bacapp_snprintf(str, str_len, ",%u}", (unsigned)value->priority);
     ret_val += bacapp_snprintf_shift(slen, &str, &str_len);
 
     return ret_val;