This commit introduces the system reader role to the API, making it
easier for administrators to delegate subsets of responsibilities to
the API by default.
Subsequent patches will include domain support for:
- system members test coverage
- system admins functionality
- domain user test coverage
- project user test coverage
Change-Id: I2e0a5de931049627e6ceb48b1c0e44205f3388e1
Partial-Bug: 1794376
Partial-Bug: 968696