Add volunteer headshot component

[joshsmith]

Problem

On this page we have photos, name, and a randomly selected role of the user. https://projects.invisionapp.com/share/SP8PSQGNM#/screens/191332621

Subtasks

• Show user's photo
• Show the user's name, or if blank, their username (see an example of this in the profile sidebar component – should maybe extract out elsewhere as a helper)
• Show one role for the user (randomly selected)

References

Progress on: #
#477

[WenInCode]

@joshsmith does this task include putting it on a page, or just building out the component (right now I assume the latter)

[joshsmith]

@WenInCode ideally putting it on the /thank-you page, but we can start with just the component and make acceptance portion a follow-on task.

[joshsmith]

@WenInCode #477 is actually more important I think, and that can be said to be done before this one is. This is not blocking that, even if it says that it is.

[WenInCode]

@joshsmith are we wanting to list all contributors (organization-members) or randomly select a subset?