Fixed GH-3604, Add STErrorListener to StTemplateRenderer.

[sunyuhan1998]

As mentioned in the issue, StTemplateRenderer uses StringTemplate as the template rendering engine.

By default, StringTemplate use org.stringtemplate.v4.misc.ErrorManager#DEFAULT_ERROR_LISTENER as the error listener for rendering exceptions, which outputs errors using System.err.println.

public static STErrorListener DEFAULT_ERROR_LISTENER = new STErrorListener() { public void compileTimeError(STMessage msg) { System.err.println(msg); } public void runTimeError(STMessage msg) { if (msg.error != ErrorType.NO_SUCH_PROPERTY) { System.err.println(msg); } } public void IOError(STMessage msg) { System.err.println(msg); } public void internalError(STMessage msg) { System.err.println(msg); } public void error(String s) { this.error(s, (Throwable)null); } public void error(String s, Throwable e) { System.err.println(s); if (e != null) { e.printStackTrace(System.err); } } } 

This can lead to users losing important information about rendering errors.

This PR introduces a custom STErrorListener that logs the exceptions to the application's logging system instead.

FIxes #3604

[ilayaperumalg]

@sunyuhan1998 Thanks for the PR!