Collects information about installed composer packages.

Command: php app/console ez-support-tools:dump-info support_tools.info_collectors.composer.lock_file

The attempt to use the Composer API is canned for now due to complexity, it can be found here in case it's useful later on:
https://github.com/ezsystems/ez-support-tools/tree/ezp-25566_composer_system_info_collector_using_composer_api