Fix ceilometer installation on compute node

The ceilometer agent running on the compute node must be configured to
access other services (keystone and AMQP). Add the missing information.

Also explicitly define log_dir for ubuntu (don't use a note).

Remove ... in program listings.

Change-Id: I3a339c5c8ccabf7c7d307357834eb8dada71271c
backport: havana
(cherry picked from commit 9cb3b161c083e4988c9297fd1731acfc4cb43b70)
Merge "Fix ceilometer installation on compute node" into stable/havana