CLOSED - Source the X509_CA_ENV_FILE in trafficops

[moltzaum]

What does this PR (Pull Request) do?

When I start up my TO container with trafficvault, the ssl keys aren't added correctly because the environment variables aren't sourced. Every other run file sources the env variables correctly, so I'm using them as a reference.

Which Traffic Control components are affected by this PR?

• CDN in a Box

What is the best way to verify this PR?

rm -rf trafficops/ca
Make sure volumes are removed by checking docker volume ls
docker-compose build trafficops
variables.env:96: AUTO_SNAPQUEUE_ENABLED=false
docker-compose up -d trafficops trafficvault
docker-compose logs -f trafficops

The trafficops logs should output exec tail -f /dev/null and stop. If the logs loop forever it didn't start up correctly.
I am running a limited stack, but running the whole stack should also work the same.

If this is a bug fix, what versions of Traffic Ops are affected?

The following criteria are ALL met by this PR

• This PR includes tests OR I have explained why tests are unnecessary
  • I am doing what the other run files are doing, which should be sufficient. There isn't a "test" per-se, but there is a conditional to test if the env var was set.
• Documentation is unnecessary
• This PR includes an update to CHANGELOG.md OR such an update is not necessary
• This PR includes any and all required license headers
• This PR ensures that database migration sequence is correct OR this PR does not include a database migration
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)

[asfgit]

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https://builds.apache.org/job/trafficcontrol-PR/3584/
Test FAILed.

[asfgit]

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Test FAILed.

[moltzaum]

retest this please

[asfgit]

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Test PASSed.

[moltzaum]

Closing because this PR solves the same issue: #3508