Add additional options to request phase

[tmking]

This PR adds the login_hint and acr_values options to authorize_uri.

[coveralls]

Coverage increased (+0.1%) to 99.475% when pulling 5543d74 on network-for-good:add_additional_options_to_request_phase into 849b181 on jjbohn:master.

[coveralls]

Coverage increased (+0.1%) to 99.475% when pulling 5543d74 on network-for-good:add_additional_options_to_request_phase into 849b181 on jjbohn:master.

[coveralls]

Coverage increased (+0.1%) to 99.479% when pulling ad4b16d on network-for-good:add_additional_options_to_request_phase into 849b181 on jjbohn:master.

[coveralls]

Coverage increased (+0.1%) to 99.479% when pulling 78fff36 on network-for-good:add_additional_options_to_request_phase into 849b181 on jjbohn:master.

[coveralls]

Coverage decreased (-3.5%) to 95.844% when pulling 985a9b4 on network-for-good:add_additional_options_to_request_phase into 849b181 on jjbohn:master.