Fix import of osa_toolkit in inventory-manage.py
Fix import of osa_toolkit in inventory-manage.py

Add the location of the osa_tookit directory to Python's library paths
to allow its modules to be imported.

Closes-Bug: 1711223
Change-Id: I70b0ce6e6415499617c0c83b1232813df07772cf

stackforge/os-ansible-deployment,yanyao/openstack-ansible,cfarquhar/openstack-ansible,openstack/openstack-ansible,stackforge/os-ansible-deployment,openstack/openstack-ansible,yanyao/openstack-ansible,bunchc/openstack-ansible,cfarquhar/openstack-ansible,bunchc/openstack-ansible