Install Guide: Fix wrong service referenced

We need to configure ceilometer.conf like it's shown correctly for
Debian a few lines later.

Change-Id: I36b12a263cdd2d6978c3cc3c35556bf59ce83ce7
Closes-Bug: #1252273
backport: havana
Install Guide: Fix profiling information

This screen was erroneously shown on Ubuntu, fix profiling.

Change-Id: Id908acfdc739ad8873263f21897a1fcccee2bf60
backport: havana
Closes-Bug: #1252316
Merge "Install Guide: Fix wrong service referenced"