PIMS-1545: AgenciesController auth checks

[LawrenceLau2020]

🎯 Summary

PIMS-1545: - AgenciesController auth checks

Added a frontend authorization check to the agency management and the agency details pages and changed the route to a protected route.
You can test using a role of "General User" which shouldn't be able to access the Agency admin page: http://localhost:3000/admin/agencies and should be redirected to the homepage.
Only admin and auditor roles should be able to access it.
May need to confirm that auditors should be able to access these pages.

🔰 Checklist

• I have read and agree with the following checklist and am following the guidelines in our Code of Conduct document.

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation where required.
• I have tested my changes to the best of my ability.
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[github-actions]

🚀 Deployment Information

The Express API Image has been built with the tag: 2320. Please make sure to utilize this specific tag when promoting these changes to the TEST and PROD environments during the API deployment. For more updates please monitor Image Tags Page on Wiki.

[codeclimate]

Code Climate has analyzed commit df19522 and detected 2 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Duplication	2

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 94.8%.

View more on Code Climate.

[github-actions]

🚀 Deployment Information

The React APP Image has been built with the tag: 2320. Please make sure to utilize this specific tag when promoting these changes to the TEST and PROD environments during the APP deployment. For more updates please monitor Image Tags Page on Wiki.

[dbarkowsky]

Works well for me.
In the future, let's see if we could extract this check into a single function. Then it could be used in many places without duplicate code.

[GrahamS-Quartech]

This is acceptable if we only need this for agencies pages right now but this is really something that should be implemented in the AuthRouteGuard or some similar wrapper component.