Cypress: port protractor OAuth tests

47) OAuth

   48) BasicAuth IDP
      ✔ creates a Basic Authentication IDP
      ✔ shows the BasicAuth IDP on the OAuth settings page

   49) GitHub IDP
      ✔ creates a GitHub IDP
      ✔ shows the GitHub IDP on the OAuth settings page

   50) GitLab IDP
      ✔ creates a GitLab IDP
      ✔ shows the GitLab IDP on the OAuth settings page

   51) Google IDP
      ✔ creates a Google IDP
      ✔ shows the Google IDP on the OAuth settings page

   52) Keystone IDP
      ✔ creates a Keystone IDP
      ✔ shows the Keystone IDP on the OAuth settings page

   53) LDAP IDP
      ✔ creates a LDAP IDP
      ✔ shows the LDAP IDP on the OAuth settings page

   54) OpenID IDP
      ✔ creates a OpenID IDP
      ✔ shows the OpenID IDP on the OAuth settings page