Add `use_lbaas` to terraform step
Add `use_lbaas` to terraform step

[#144444137](https://www.pivotaltracker.com/story/show/144444137)

Signed-off-by: Felix Riegger <9c2aa7530239a330bbac6ac4f56e0946781dfd29@sap.com>

cloudfoundry-incubator/bosh-openstack-cpi-release,cloudfoundry-incubator/bosh-openstack-cpi-release,cloudfoundry-incubator/bosh-openstack-cpi-release