tree cb9355e6474bf663f2c5e0b27f90d469606d5262
parent 97d902e21df004fd4a9ffec52a6356d5c34b7208
author James E. Blair <jeblair@hp.com> 1408656677 -0700
committer James E. Blair <jeblair@hp.com> 1409156185 -0700

Cloner: add upgrade test

This is the 'test_grenade_forward' and 'test_upgrade_backward'
tests from d-g.  Both scenarios are covered because they both
simulate havana->master upgrades, just changing which of them
is the 'current' change.  Since we examine the states of all
changes, in the course of running the test we check the results
for both when a current change is havana and master.

This also covers the 'test_branch_override' case from d-g.

Change-Id: I95abd62279bd44e88a608ad908f4876d11d50ec2