Changes applied for the RHOS certification

Change-Id: I25bf5db8e91d79688a490a484fb38b204ea6ff8c
Signed-off-by: Rossella Sblendido <rossella@midokura.com>
Handle multiple subnets

Signed-off-by: Rossella Sblendido <rossella@midokura.com>

Change-Id: I2ecba9e6f1605e1e37091e073318c2f2da4fd9c5
Use DtoRange for rule and remove external_id

Integration code modified to match the changes in the python client
Don't throw an exception because the certification tests don't
like that

Signed-off-by: Rossella Sblendido <rossella@midokura.com>
Reapply changes from commit aafe90c

Change-Id: I0e39b7765a49924035b564acfc90b61c9a3a52e6
Signed-off-by: Rossella Sblendido