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

apps/writeprop/main.c

@@ -401,7 +401,8 @@ int main(int argc, char *argv[])
                              */
                             fprintf(
                                 stderr,
-                                "Error: unable to parse the tag value\n");
+                                "Error: unable to parse tag=%ld value=%s\n",
+                                property_tag, value_string);
                             return 1;
                         }
                     } else {