Complete version injection tests coverage by also checking the ngap build.

[ndp-opendap]

Overview

We don't run the regressions_tests_script.sh on NGAP builds, rather we use test_image_starts_without_crashing.sh (Did it start? Woo!) and then relying on the downstream NGAP CICD running to run the actual hyrax_regression_tests. But that silently skips running either of the other tests in regressions_tests_script.sh. I think the check_version() test could be utilized in test_image_starts_without_crashing.sh

The tests in check_version() that involve accessing the running server using cURL will fail because the auth stuff will be broken on our TravisCI deployment. Probably just the parts of check_version() that use docker commands to inspect the image will be available.

Naming

Consider either renaming regressions_tests_script.sh to something like test_suite.sh and integrate test_image_starts_without_crashing.sh into it.
OR
Decompose regressions_tests_script.sh functions into single purpose shell scripts.

[ndp-opendap]

@hannahilea This is to complete the test coverage for the version strings.