Use ConnectionBuilder to call userinfo endpoint

[madurangasiriwardena]

Checklist

• I read the Contribution Guidelines
• I signed the CLA and WG Agreements
• I ran, updated and added unit tests as necessary.
• I verified the contribution matches existing coding style.
• I updated the documentation if necessary.

Motivation and Context

Userinfo endpoint call does not honor https_required configuration, which is done for token endpoint call.

Resolves #467

[codecov-io]

Codecov Report

Merging #468 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #468   +/-   ##
=========================================
  Coverage     83.71%   83.71%           
  Complexity      479      479           
=========================================
  Files            42       42           
  Lines          2345     2345           
  Branches        233      233           
=========================================
  Hits           1963     1963           
  Misses          299      299           
  Partials         83       83

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[madurangasiriwardena]

Any update on this?

[agologan]

LGTM

[cumcum8197]

c9f76f1