* provider/openstack: Rename provider to loadbalancer_provider
This commit renames provider to loadbalancer_provider in the
openstack_lb_loadbalancer_v2 resource.
It also changes security_group_ids to Computed so default
security groups are added to the state correctly.
* provider/openstack: Switch to a deprecation path for loadbalancer provider
This commit switches to using a deprecation path for removal of the
previous "provider" argument in favor of the new "loadbalancer_provider".
* provider/openstack: LoadBalancer Security Groups
This commit adds the ability to specify security groups on a loadbalancer
resource.
* provider/openstack: LoadBalancer Security Groups Refactor
Moving common security group code into a dedicated function.
This commit cleans up the acceptance test formatting for the lbaas v2
resources. It also modifies the devstack script to enable the lbaas
v2 service for testing. Finally, this commit increases the timeout
for load balancer creation since it takes some time to do within
devstack.
