Fix test-deregistration script

- Fix issue where script breaks with newer version of docker-compose
  caused by profile names being omitted during `docker-compose down`
- Use main .gitignore file to ignore metrics-reports directory
- Fix Intelli-j/shellcheck warnings (mostly variables needing quotes)
- Script prints summary report at exit

Issue-ID: CPS-1552
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: Ia51e51c1c199de8cc2f4878bfb04cb09fbb0b0e7
3 files changed