osd/osd_types: fix pg_t::contains() to check pool id too

osd/osd_types: fix pg_t::contains() to check pool id too

This is used by bluestore fsck to ensure we're looking at the right
collection.  It needs to validate both that the pool id matches the
object (including the temp objects) and that the hash matches; we were
only checking the hash before.

Fixes: http://tracker.ceph.com/issues/32731
Signed-off-by: Sage Weil <sage@redhat.com>