fix: use rig instances per rig camera
fix: use rig instances per rig camera

Summary: This Diff strengthen the # of rig instances requirements for unleashing rig camera poses. In the Aria case, all rig instances have different cameras, which is over parametrized in that case.

Reviewed By: Ahmed-Salama

Differential Revision: D37717628

fbshipit-source-id: a24e7a1666af9711b131455864699c8cb7c2494e

mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM