fix name of scheduler_driver in produced nova.conf

Fixes bug #1202174.  The nova.conf config variable that configures which
scheduler to use is scheduler_driver, not compute_scheduler_driver.

Change-Id: I775cae40edc9f8f55177f9d95cdbaa9416c4bfcd
Create an endpoint for nova api v3.

Supports both SQL and templated keystone backend.
Create an additional endpoint for nova api v3.
The service type is computev3.
The endpoint is similar to the v2 one but the version
part is "v3" rather than "v2", and it does not include
the tenantid anymore.

Fixes: bug #1191798
Change-Id: I86e4734c3a9e57f1dc68f1104449d7c041d6927d
Merge "fix name of scheduler_driver in produced nova.conf"
Merge "Create an endpoint for nova api v3."