User Story 64, EXTENSION: Admin can edit a user's profile data

[BrianZanti]

As an admin user
When I visit a user's profile page ("/admin/users/5")
And I click the link to edit the user's profile data
The same behaviors exist as if I were that user trying to change their own data
Except I am returned to the show page path of
"/admin/users/5" when I am finished

DO THESE STORIES FIRST:

• User Story 5, Admin Navigation
• User Story 56, Admin User Profile Page

Checklist:

• base tests are written
• base code is written to pass tests
• edge case ("sad path") tests written (if required)
• edge case code written (if required)
• code is reviewed
• branch is merged
• all tests still pass

child of #201

child of turingschool-projects#274

depends on turingschool-projects#268

depends on #206