performs a full scan of the db to load all available institutions

[gmrabian]

Summary

• Remove image loading on DB pull (image loading will be moved to card render similar to #108)
• Add scanAll DB call
• Add test for scanAll

Fixes #109

Type of change

• [x] New feature (non-breaking change which adds functionality)

How To Test

• Export AWS credentials
• Run yarn dev
• Visit localhost:3000 and verify all the institutions load (long list!)
  • Verify the time is not that bad (about .25-.4 seconds)

Later we will save these in state management so that it is a pull once, which will save time during navigation and filtering.

Checklist:

• [x] My code follows the style guidelines of this project and has no linting errors
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation, including any applicable ADRs
• [x] My changes generate no new warnings
• [x] I have added tests that fail without these changes
• [x] New and existing tests (unit, integration, accessibility) pass locally
• [ ] Documentation updated
• [ ] If there are security concerns they are addressed or ticketed after being discussed

[codeclimate[bot]]

Code Climate has analyzed commit 4132f2a4 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (80% is the threshold).

This pull request will bring the total coverage in the repository to 96.0% (0.0% change).

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