A new same_subtree query parameter will be accepted. The value is
a comma-separated list of request group suffix strings $S. Each must
exactly match a suffix on a granular group somewhere else in the
request. Importantly, the identified request groups need not have
a resources$S.
If this is provided, at least one of the resource providers satisfying
the specified request group must be an ancestor of the rest.
The same_subtree query parameter can be repeated and each repeat group
is treated independently.
Co-Authored-By: Chris Dent <cdent@anticdent.org>
Change-Id: I7fdeac24606359d37f1a7405d22c5797840e1a9e
Story: 2005575
Task: 30784
8395e3f099