Openstack CPI creates VM with config drive

if use_config_drive cpi property is set

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
Add use_config_drive property in director config

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
Write UseConfigDrive agent option in openstack stemcells

Signed-off-by: Andrei Dinin <adinin@pivotal.io>
Add lifecycle tests for config drive on Openstack

Signed-off-by: Andrea Law <alaw@pivotal.io>
Bump agent with config drive changes