Wip 8231 forreview


Renamed ceph_objectstore_tool with features 8231 and 8276.

This branch includes a change to the way coll_t::META is handled due to a segmentation faults caused by linking both libcommon and librados in the same application.   ceph_objectstore_tool does just that.

ceph_filestore_tool functionality is subsumed by the new application

In order to get a healthy cluster to start for the unit test, have vstart.sh set 'mon pg warn min per osd' to 0 (disabled) instead of 10 since it can't be over-ridden.