Remove stable/grizzly provisions and workarounds

Any grizzly-specific configuration and routines are removed, but
this should not be merged until all stable/grizzly proposed changes
have been abandoned, corresponding branches tagged and deleted and
job removal in I39f93f67b96961cd9991b6a13fecddb16e3a20fa merged.

Change-Id: I7bec50a588f6a1753e3509bd3034f617e8cb6084
Merge "Remove stable/grizzly provisions and workarounds"