Open vSwitch 1.3 and older was creating certificates and private
key in /usr/share/openvswitch/pki.  However, since PKI directory
is mutable, then this was considered a bug and PKI directory was
moved to /var directory in Open vSwitch 1.4 Commit 14bd2d51

 (debian:
Move PKI directory to FHS-compliant location.)

Note, that Ubuntu 12.04 already was shipping with Open vSwitch 1.4
and should have created (in case of fresh install) or moved (in
case of upgrade from Open vSwitch 1.3) this directory to the right
location.

So I am inclined to remove this code because the only reason for it
to exist would be, if someone would be upgrading from Open vSwitch
1.3 or older version directly to 2.5 without using any intermediary
upgrade releases.

Signed-Off-By: Ansis Atteka <aatteka@nicira.com>
Acked-by: Ben Pfaff <blp@ovn.org>