Support specifying the exception types you want to break on

[testforstephen]

this requires microsoft/java-debug#481

Fixes #1175
Fixes #295

Here is how to enable exception breakpoint on the specified exception type:

1. Configure the exception types in the setting java.debug.settings.exceptionBreakpoint.exceptionTypes.

    "java.debug.settings.exceptionBreakpoint.exceptionTypes": [
       "java.lang.NullPointerException" // fully qualified class name
    ]

2. Go to Breakpoint view, toggle the CaughtException or UncaughtException.
   

[testforstephen]

With the sample code below, I want to break on the exception MyCustomException only.

package org.springframework.samples.petclinic;

public class ExceptionTest {
    public static void main(String[] args) {
        try {
            throw new NullPointerException("NPE");
        } catch (NullPointerException e) {
            System.out.println("Catch NPE.");
        }

        try {
            System.out.println("try");
            throw new MyCustomException("custom");
        } catch (Exception e) {
            System.out.println("catch");
        } finally {
            System.out.println("finally");
        }
    }

    static class MyCustomException extends Exception {
        public MyCustomException(String message) {
            super(message);
        }
    }
}

Firstly you need to toggle caught/uncaught Exception in Breakpoint view.

Then go to settings.json, customize the breakpoint filters. Two kinds of filters both work for the purpose above:

1. Specify the target exception type directly:

    "java.debug.settings.exceptionBreakpoint.exceptionTypes": [
        "org.springframework.samples.petclinic.ExceptionTest$MyCustomException",
    ],
    "java.debug.settings.exceptionBreakpoint.allowClasses": [
    ],
    "java.debug.settings.exceptionBreakpoint.skipClasses": [
   ]

2. Specify the locations where the exception breakpoint can break on:

    "java.debug.settings.exceptionBreakpoint.exceptionTypes": [
    ],
    "java.debug.settings.exceptionBreakpoint.allowClasses": [
        "*.ExceptionTest"
    ],
    "java.debug.settings.exceptionBreakpoint.skipClasses": [
    ]