Added pycryptodomex as depdendency
needed for packaging cgcs-patch.
When running tox on patch-alarm with py36 env,
it raises an exception, when trying to import
Cryptodome.
There is also a workaround here:
https://review.opendev.org/c/starlingx/config/+/800099
Story: 2008454
Task: 42768
Signed-off-by: Daniel Safta <daniel.safta@windriver.com>
Change-Id: Ic97d7779e601026c362110c706168f328dcd65be
(cherry picked from commit 614e73687e)