Revert "slap lib: disable 'Unverified HTTPS request is being made' messages."

This reverts commit a8f83ef9 and the
other places where this pattern was copied.

If some non verified connection is being made, let's be honest and don't
hide it to user.
6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

01:00:25

passed SlapOS.Eggs.UnitTest-Jerome.Python2

01:12:34

failed SlapOS.Eggs.UnitTest-Jerome.Python3

passed SlapOS.Eggs.UnitTest-Master.Python2

00:21:01

failed SlapOS.Eggs.UnitTest-Master.Python3

00:10:41

failed SlapOS.Eggs.UnitTest-Jerome.Python3

00:31:11