Fix the worker startup command in integration support

The argument now takes in the worker name and not the index

Author: mariash

src/spec/integration_support/director_service.rb

@@ -37,7 +37,7 @@ def initialize(options:, command_builder_class:, logger:)
 
       @worker_processes = (0..2).map do |index|
         Service.new(
-          @command_builder.array_for("bundle exec bosh-director-worker -c #{@director_config} -i #{index}"),
+          @command_builder.array_for("bundle exec bosh-director-worker -c #{@director_config} -n worker_#{index}"),
           { output: "#{@base_log_path}.worker_#{index}.out", env: { 'QUEUE' => 'normal,urgent' } },
           @logger,
         )