Replace duplicate code with a global environment variable

[70825]

Is your feature request related to a problem? Please describe.

I find duplicate code and it seems like it can be refactored to eliminate the redundancy.

Describe the solution you'd like

All jobs are using the same value for the MVN_CMD environment variable in ci.yml

So I think it would be better to use a global environment variable

[AS-IS]

jobs:
  oracle:
    env:
      MVN_CMD: ./mvnw --no-transfer-progress -B
  temurin:
    env:
      MVN_CMD: ./mvnw --no-transfer-progress -B
  ...

[TO-BE]

env:
  MVN_CMD: ./mvnw --no-transfer-progress -B

...

Describe alternatives you've considered

x

Additional context

If you want this changed, can I try this issue?

I've always wanted to contribute directly to the JWT library that I've been using 😀

[lhazlewood]

Thanks for the issue! If you'd like to open a pull request, and the build works, I'd be happy to include your improvement :)