Python: update pip and distribute

Closes #18358.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
clozure-cl 1.9

Closes #18351.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
sshpass: add to blacklist.

We keep rejecting this again and again.

See discussion in #9577, #12941, #13855.

Closes #18332.