Update Gnocchi rocky to 4.3.X
Update Gnocchi rocky to 4.3.X

The Gnocchi branch Rocky have been cutted, and the first Gnocchi
4.3 have been released.

This change the tracked branch to reflect that.

Depends-On: I05dd4566ef90f18853cec315cf7ab04c3ec93090
Change-Id: I0634291532584bb2c3b7eb3c6a4a4036c39950c5

redhat-openstack/rdoinfo,javierpena/rdoinfo