Switch novato the upstream api-paste.ini

We had a copy of this file which needed to be maintained by tripleo,
using the upstream version means we should no longer have to maintain
it. In this case the reason for doing this is to enable the nova v3 API.

The tempest tests for the nova v3 api require it to be enabled.

Change-Id: I98583009cd18adda4443ce0b00a584434a4abf81
Merge "Switch novato the upstream api-paste.ini"