CUMULUS-3580 Use the correct variable for lzards launchpad secret value

[Jkovarik]

Summary: Summary of changes

Addresses CUMULUS-3580

Changes

• **CUMULUS-3580
  • Fixed secret value for lzards_launchpad_passphrase which was getting the value from var.launchpad_passphrase instead of var.lzards_launchpad_passphrase.

PR Checklist

• Update CHANGELOG
• Unit tests
• Ad-hoc testing - Deploy changes and test manually
• Integration tests

[paulpilone]

I resolved the CL merge conflict and waiting on the new build to pass. Otherwise this looks good to me.

[jennyhliu]

Currently launchpad token is cached in s3 https://github.com/nasa/cumulus/blob/v18.2.0/packages/launchpad-auth/src/LaunchpadToken.ts. More changes are needed if we cache more than one token. Also, we need to have a separate token service account to verify the change.

[Jkovarik]

@jennyhliu nods that's a good point, this code has evolved, and there's a caching assumption. I'll update the ticket with this commentary, but at a minimum we'd need to update getLaunchpadToken.

I'm not sure I agree we have to have another token service account - we can configure the same TSA with seperate cache files and that with units should cover this case sufficiently.