This is the first of a few related changes that re-organize our API after the big recent changes that introduced the supervisor component.
Signed-off-by: Matt Moyer <moyerm@vmware.com>
- Variables specific to concierge add it to their name
- All variables now start with `PINNIPED_TEST_` which makes it clear
that they are for tests and also helps them not conflict with the
env vars that are used in the Pinniped CLI code
