Attack config unsafe warning

[mssalvatore]

What does this PR do?

Adds a warning when a user submits an ATT&CK config that could be unsafe.

The ATT&CK configuration screen could allow users to unknowingly submit a potentially unsafe configuration.

Example

1. Go to Exploits and enable an unsafe exploiter.
2. Submit config -- you are warned that this config may be unsafe.
3. Go to the ATT&CK configuration screen and click submit -- You are not warned that the config may be unsafe
4. Export the configuration
5. Open the exported configuration and verify that the unsafe exploiter is present in the configuration.

Solution
When ATT&CK configurations are submitted, the workflow is:

1. ATT&CK configuration is submitted to the back-end.
2. The back-end converts the ATT&CK configuration into a regular configuration
3. The front-end pulls the new, regular configuration from the back-end.

The ATT&CK configuration does not contain enough information for the front-end to simply determine whether or not it is safe. Therefore, the front-end relies on the back-end to translate the ATT&CK config into a regular config before it can evaluate safety. The front-end can then only warn the user, not prevent submission as in #1000.

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Added relevant unit tests?
• Have you successfully tested your changes locally? Elaborate:

  Tested locally. See screenshot

• If applicable, add screenshots or log transcripts of the feature working

[codecov]

Codecov Report

Merging #1006 (a152da0) into develop (cfaf4a1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1006   +/-   ##
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  Coverage    26.11%   26.11%           
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  Files          402      402           
  Lines        12821    12821           
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  Hits          3348     3348           
  Misses        9473     9473           

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[VakarisZ]

Looks good. Good job!