Integrate GraalVM JS to script mediator

[arunans23]

Purpose

Describe the problems, issues, or needs driving this feature/fix and include links to related issues in the following format: Resolves issue1, issue2, etc.

$subject
This will replace existing rhinoJS and be an alternative to deprecated nashornJs.

Note: E4X is deprecated and it is not supported by GraalVM JS engine. To overcome this when using GraalJS, DOMparser can be used to parse XML strings rather than using XML objects. But then the users who are using
script mediator with the new GraalVM JS engine will not be able to use XML objects in javascript but they will be able to use setPayloadXML and getPayloadXML methods in script mediator by using string representations of XML.

To maintain backward compatibility, the existing rhinoJs engine is kept and it can be used by setting the language as "rhinoJs" in the script mediator syntax.

Example

<script language="rhinoJs">
     var bNode = mc.getPayloadXML().b;
</script>

Default "js" language will be utilizing the graalVM JS engine.

Example

<script language="js">
     var rno = mc.getPayloadXML().toString(); 
      var st1 = mc.getEnvelope().getBody().getFirstElement().getText();
     mc.getEnvelope().getBody().getFirstElement().setText(st1 * 2);
</script>