Remove versioning from IOVisor APIs PATH

Fix bug #1220454

In the first version of the IOVisor driver, versioning was included in the
the PATH of the native IOVisor commands which was /opt/pg/bin/0/
In the current version, versioning has been deleted from the PATH and
now it should only include /opt/pg/bin/

Change-Id: I2b88eb28593043843a9ac0afd5bff7c268db0f60
Merge "Remove versioning from IOVisor APIs PATH"