upgrade/dumpling-emperor-x: ignore 'scrub mismatch' from mon

The encoded full osdmaps can differ due to a series of issues that were
fixed well after emperor.  We also whitelist this for dumpling-x.

Signed-off-by: Sage Weil <sage@inktank.com>
upgrade/dumpling-emperor-x: do not warn about tunables

We do the same for dumpling-x.

Signed-off-by: Sage Weil <sage@inktank.com>