Update Telemetry measures document
Update Telemetry measures document

- update info of added and deprecated meters
- add note for removing instance meter
- fix some error info

Change-Id: Ifd80722cbc4d46ee2759a115030dc615ce83c1e2

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals