Add README.txt file with details on how to use hardware_vtep schema

Change-Id: I75842f8e32fec9d8fbd8edea418c72725ea39544
Signed-off-by: Sam Hague <shague@redhat.com>
Add assumeTrue around hardware_vtep schema check

The images used in the jenkins jobs do not support hardware_vtep so this is needed to pass the test.

Change-Id: I8fe016c29613d0a520585d9419d63aa4887a3864
Signed-off-by: Sam Hague <shague@redhat.com>
Merge changes I8fe016c2,I75842f8e

* changes:
  Add assumeTrue around hardware_vtep schema check
  Add README.txt file with details on how to use hardware_vtep schema