Add default scopes to silent requests

[tnorling]

• Adds openid and profile to all requests during parameter builder step. eSTS expects that these scopes are present on all requests.
• Removes these scopes from the cache lookup logic to prevent cache misses if the service does not return these scopes in the response.
• Removes these scopes from intersecting scope logic to prevent possible unintended removal of tokens that contain these scopes.

[coveralls]

Coverage increased (+0.08%) to 83.325% when pulling 92ea914 on default-scopes-silent-calls into 75521b5 on dev.

[pkanher617]

Looks good. Make sure we add/update tests before we merge.

[jo-arroyo]

LGTM!