set server and client keys in unitdata

[jamesbeedy]

@mbruzek currently only the client/server certs get set in the unitdata. How do you feel about setting the keys too?

[mbruzek]

We kept the keys out of unit data as the unit data can be dumped. Unit data is not secure so I am not sure if that is wise to store the (often private) keys there.

Please give me a use case that does not work for you now, and how the unit data would make that easier.