Fix uninitialized constant error in runit build.
Fix uninitialized constant error in runit build.

Explicitly require safe_yaml avoid "uninitialized constant Gem::SafeYAML" error due to version nightmares

Same change as in 630356c8790568003f45a589eb1dd7ab92a20677, plus remove envconsul since it 404s
and isn't used.

socrata/shipyard,socrata/shipyard,socrata/shipyard