[#736] Added tests for webhook and docker deployment.

[richardgaunt]

closes #736

Checklist before requesting a review

• I have formatted the subject to include ticket number as [#123] Verb in past tense with dot at the end.
• I have added a link to the issue tracker
• I have provided information in Changed section about WHY something was done if this was not a normal implementation
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
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Changed

1. Added tests for webhook, docker login and docker deployment scripts

[richardgaunt]

Currently scripts have default values for these two environment variables and so check will currently not fail.

[richardgaunt]

closes #736
All deployment tests have now mocked up tests.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 68.35%. Comparing base (4c7fbbd) to head (526131c).

Files	Patch %	Lines
.scaffold/tests/bats/_helper.deployment.bash	0.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1257      +/-   ##
===========================================
- Coverage    68.43%   68.35%   -0.09%     
===========================================
  Files           50       50              
  Lines         3083     3087       +4     
===========================================
  Hits          2110     2110              
- Misses         973      977       +4     

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[AlexSkrypnyk]

@richardgaunt
Thank you for your contribution!