[5] Refactor Pages to consume authentication information differently.

[bleafman]

Right now, auth information is passed from App to Pages.

React 16.8 updated the Context API and testing suites do not have an easy way to pass context functionality. It's currently an open ticket with Enzyme (enzymejs/enzyme#1553) but has been in the works for a while.

Options are to either:

• Wait until Enzyme completes support
• Refactor to Auth0 Lock for embedded login/logout
• Server Side render restricted pages

Depending on how the product roadmap evolves/when Enyzme resolves the issue we can pursue one of the above.

[bleafman]

Depends on #146