Updated math variable execution to use net.java.dev.eval package. Safer

and more robust than using JavaScript Engine Eval. Also, added checks if
a default vera address is uses , "1.1.1.1", that we ignore the vera
helpers to not throw errors.

src/main/java/com/bwssystems/HABridge/BridgeSettings.java

@@ -61,4 +61,9 @@ public class BridgeSettings {
 		this.vtwocompatibility = vtwocompatibility;
 	}
 	
+	public Boolean isValidVera() {
+		if(this.veraaddress.contains(Configuration.DEFAULT_VERA_ADDRESS))
+			return false;
+		return true;
+	}
 }