* [docker-in-docker] - toggle ip6tables settings value as option

* Update src/docker-in-docker/devcontainer-feature.json
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* Update src/docker-in-docker/devcontainer-feature.json
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* ip6tables - can be toggled

* changes as requested

* change to add test file..

* changes for docker_build_older test passing

* misc change

* CHANGE

* chg

* minor change to make tests pass

* for sh compatibility

* change for version

* small change

* few imp. changes

* few changes

* for test passing

* minor commit

* version added to a test scenario

* changes

* LOGIC was moved outside the init file for faster initialization times

* changes

* logic updated !

* chg

* default value to be null

* changes as suggested in review comments..

* by mistake

* another small change

* requested changes in comments (review pr)

* change as requested

* changes as suggested in review comments

* Update src/docker-in-docker/install.sh
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

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Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>