Python 3 fix for sphinx doc
Python 3 fix for sphinx doc

In Python 3, dict methods dict.keys() return “views” instead of lists.
Therefore, the code:

    impls = sorted(matrix.targets.keys())
    impls.sort()

should be replaced by:

    impls = sorted(matrix.targets.keys())

to be Python 3 compatible.

Change-Id: I50477b0ac43adff9e9b0220bd7c48d6ebb6471b3

phenoxim/nova,mikalstill/nova,mahak/nova,klmitch/nova,gooddata/openstack-nova,klmitch/nova,rahulunair/nova,klmitch/nova,mahak/nova,klmitch/nova,mahak/nova,gooddata/openstack-nova,gooddata/openstack-nova,openstack/nova,rahulunair/nova,mikalstill/nova,openstack/nova,rahulunair/nova,gooddata/openstack-nova,openstack/nova,phenoxim/nova,mikalstill/nova