Mir

Comment 22 for bug 1540731

so currently holding up promotion of mir - so, just noting here (mainly for alan) we're disabling this test on mir 0.19.1 rel, if this bug gets fixed, we should reinstate test if we do a 0.19.2
aiui, we've left it active on devel - so might be fixed by time we do mir0.20 and this will be moot