Akamai gtm cli docker files

[bdhanalakshmi-chwy]

Akamai docker shell missing the GTM CLI package, we need to include the GTM packages in the akamai shell

[bdhanalakshmi-chwy]

Thanks a lot for the PR, indeed this will be a good addition to the docker image.

Please also

• add the appropriate lines to the /variants file so that the akamai/gtm variant is built, and so it is included in the akamai/shell image (currently nothing will happen).
• add a simple sanity test to the /tests.bats file
• add the variant to the matrix in the /README.md file
• address the inline comment regarding the ENTRYPOINT

yes, ENTRYPOINTS added for testing, i have removed this line

[ynohat]

Thanks @bdhanalakshmi-chwy, this looks good in general, I will update this once tested.

[bdhanalakshmi-chwy]

Thanks @bdhanalakshmi-chwy, this looks good in general, I will update this once tested.

Thanks @ynohat

[ynohat]

rebased and merged