CORE-69: swagger-ui webjar to 5.18.2

[davidangb]

Jira: https://broadworkbench.atlassian.net/browse/CORE-69

This is a fixed version of #349. When updating swagger-ui, we also need to update our path to the swagger-ui webjar. Supersedes #349.

---

• Submitter: Make sure Swagger is updated if API changes
• Submitter: If updating admin endpoints, also update firecloud-admin-cli
• Submitter: Update FISMA documentation if changes to:
  • Authentication
  • Authorization
  • Encryption
  • Audit trails
• Submitter: If you're adding new libraries, sign us up to security updates for them

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.71%. Comparing base (0453a95) to head (1cbdfd7).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #352   +/-   ##
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  Coverage    59.71%   59.71%           
========================================
  Files           18       18           
  Lines          638      638           
  Branches        66       66           
========================================
  Hits           381      381           
  Misses         257      257           

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