Family.ignore_certificate_error was a special flag to allow a family to ignore SSL certificate errors, where it was know the certificate was invalid. disable_ssl_certificate_validation was a special flag in http which achieved this.
It wasnt re-implemented when switching from httplib2->requests, and this was missed due to T101138: Certificate test can't fail as the certificate is valid.
Change 228651 had a related patch set uploaded (by VcamX):
Re-implement disable_ssl_certificate_validation
xZise already had a working patch for this (https://gerrit.wikimedia.org/r/#/c/215507), which didnt reference this task number.
Change 228651 abandoned by VcamX:
Re-implement disable_ssl_certificate_validation
Reason:
Abandoned as it's duplicated. See I0fe9023c.
Change 215507 had a related patch set uploaded (by XZise):
[FIX] http: Disable certificate validation