* tests(fix): `spam_junk_folder.bats` Wait on Amavis port to be ready
Postfix can potentially be ready before Amavis is. This caused test failures as mail was sent before Amavis was ready to process it.
Both test cases shared the same test logic, except for the expected location to deliver the spam to. Extracted into a shared test method, and moved the port conditions into there.
* tests(chore): `spam_junk_folder.bats` minor revisions
Test case descriptions, container names and test prefix are now more descriptive of what is under test here (an ENV for Amavis).
* tests(chore): Move Amavis bounce test into `spam_junk_folder.bats`
These two tests seem to be related to the same feature. Grouping them into a single test file instead.
* tests(refactor): Split shared method into smaller methods
Now it can be better shared with the bounce test case.
* tests(chore): Shift test cases to match their CONTAINER_NAME order
No changes to code, just cut + paste of the `CONTAINER3_NAME` test case to shift it to the last test case position.
- The usual serial to parallel test conversion to utilize the `setup.bash` common setup structure, and adding a `TEST_PREFIX` var for each test case to leverage.
- Standardize on parallel test naming conventions for variables / values.
- More consistent use of `bash -c` instead of `/bin/bash -c` or `/bin/sh -c`.
- Using the `_run_in_container` helper instead of `run docker exec ${CONTAINER_NAME}`.
- Updates tests to use the `check_if_process_is_running` helper.
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chore: Revise inline docs for the `ssl_letsencrypt` test
- Moves the override to be in closer proximity to the `initial_setup` call, and better communicates the intent to override.
- Removes top comment block that is no longer providing value or correct information to maintainers.
- Revised `acme.json` test case inline doc comments.
