test: remove hardcoded worker chunk id
test: remove hardcoded worker chunk id

This commit changes how we retrieve the worker chunk Id. Prior to this change we hard coded the value, now we get it by reading the file names on disk.

angular/angular-cli,clydin/angular-cli,angular/angular-cli,clydin/angular-cli,clydin/angular-cli,angular/angular-cli,angular/angular-cli,clydin/angular-cli