Fix bigswitch setup.cfg lines

Bigswitch was not correctly creating the bigswitch/ssl/ca_certs and
host_certs directories when running the setup.py install step.  This
makes it difficult to correctly package the plugin because it has
missing files/directories.

Fixes bug 1358982

Change-Id: I78c6e96887340ea90494ed9e109b3b7fda6653c9
Merge "Fix bigswitch setup.cfg lines"