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/dao/DeviceRepository.java

@@ -3,7 +3,6 @@ package com.bwssystems.HABridge.dao;
 
 import java.io.IOException;
 import java.io.StringReader;
-import java.nio.file.FileSystem;
 import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;