conf: Trivial cleanup of compute.py
conf: Trivial cleanup of compute.py

* Fix indentation
* Add TODOs for items that still need attention

Change-Id: Id920e8eaf5af122b23ac4069cca6a89ad5355c70
blueprint centralize-config-options-ocata

openstack/nova,mikalstill/nova,rahulunair/nova,gooddata/openstack-nova,jianghuaw/nova,mahak/nova,klmitch/nova,sebrandon1/nova,vmturbo/nova,Juniper/nova,mikalstill/nova,rajalokan/nova,Juniper/nova,hanlind/nova,openstack/nova,Juniper/nova,sebrandon1/nova,jianghuaw/nova,klmitch/nova,klmitch/nova,phenoxim/nova,hanlind/nova,rahulunair/nova,gooddata/openstack-nova,vmturbo/nova,cloudbase/nova,rahulunair/nova,gooddata/openstack-nova,rajalokan/nova,Juniper/nova,jianghuaw/nova,mikalstill/nova,gooddata/openstack-nova,klmitch/nova,rajalokan/nova,sebrandon1/nova,rajalokan/nova,vmturbo/nova,phenoxim/nova,jianghuaw/nova,cloudbase/nova,vmturbo/nova,mahak/nova,mahak/nova,cloudbase/nova,hanlind/nova,openstack/nova