update build script to fix SNI warning during upload to pypi
update build script to fix SNI warning during upload to pypi

as suugested here:
https://urllib3.readthedocs.io/en/latest/user-guide.html#ssl-py2

Change-Id: Id7dfe237e24ac64757130a4110775c2ecf7d1949
(cherry picked from commit 94ee54f13ea009aee0073445077809e01ca6ae77)

openstack/networking-bigswitch,wolverineav/networking-bigswitch,openstack/networking-bigswitch,wolverineav/networking-bigswitch,stackforge/networking-bigswitch,stackforge/networking-bigswitch