Allow for addition of projectName in the debug

[mixtoism]

vscode java debugger requires a projectName field in the debugger in order to properly find the related classes. this change should be implemented in the start debugging request to vscode adding the appropiate field.

example of a working launch.json

    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "Debug in Wildfly",
            "request": "attach",
            "hostName": "localhost",
            "port": "52356",
            "projectName": "projectName" --> this name matches the artifact id tag in the pom.xml
        },

Appropiate changes should be made in src/debug/javaDebugSession.ts:33-42

private async startDebugger(port: string) {
        this.port = port;
        vscode.debug.startDebugging(undefined, {
            type: 'java',
            request: 'attach',
            name: 'Debug (Remote)',
            hostName: 'localhost',
            port,
           projectName, // this could be asked via the prompt to the user or acquired somehow
        });
    }

[robstryker]

Pinging @fbricon privately on this issue to see if he has any advice. Specifically, some users may deploy multiple projects to a server and thus need multiple project names to be part of the launch. Asking to see if that's possible at all.

[robstryker]

I opened microsoft/vscode-java-debug#1197 to allow the possibility to add multiple projects, since users may deploy multiple deployments to a single server. But until that is addressed, I'll go with a solution like you've suggested.