Updated openstack/openstack
Project: openstack/ceilometer  01d70a2c8b33301b47c5ffa8d9e6e33584377216

Fix help strings

For consistency, add "." at end of help strings, fix grammar and
capitalization. Remove "(float)" from heartbeat since the description
will include the type.

Change-Id: I0d6f4203b2b6de1dc22a156aa67526a067e48cbb