REST Integration tests improvements 1

[Nana-EC]

Detailed description:
REST API tests have been hard to decipher, modify and are sometimes not consistent.
These changes provide some scaffolding and changes to improve the integration tests on the REST side

• Added integration_db_ops.js file to handle db logic and docker management
• Removed sqlconnection references from integration.test.js
• Implemented beforeeach logic to make tests more atomic. Updated data json file appropriately

Which issue(s) this PR fixes:
Partially addresses #412 with inspiration from #529

Special notes for your reviewer:

Checklist

• Documentation added
• Tests updated

[apeksharma]

i believe you want to iteratively make these tests better by sending in small patches and have some direction in mind (?). I wouldn't waste time on review iterations to make individual PR marginally better.
I don't mind small errors in individual PRs if we can get to 'good tests' faster.
Keep the good stuff coming.
skimmed, changes are only in test files, so approved.
edit: once the checks pass, ping me, i'll re-apply the approval.

[codecov]

Codecov Report

Merging #590 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #590   +/-   ##
=========================================
  Coverage     64.49%   64.49%           
  Complexity      171      171           
=========================================
  Files           101      101           
  Lines          3157     3157           
  Branches        363      363           
=========================================
  Hits           2036     2036           
  Misses          971      971           
  Partials        150      150

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