Install guide fixes for ceilometer

* install the alarming services on debian/ubuntu (needs checking for
  rhel/centos/fedora)
* use the correct section for the metering_secret option
* the cinder installation suggests two nodes, reflect this in the cinder
  config for ceilometer

Change-Id: I5fa4b1ee993f2d5cbb90724d3855a55ecd339ea3
Use wildcard for keystone log files

SUSE has followed Triple-O/devstack recommendations for setting up the
keystone log files and now uses in /var/log/keystone instead of
keystone.log the files keystone-all.log and keystone-manage.log.

Use a wildcard to handle both variations.

Change-Id: I23ef7a07bb6652b647bc3a8168aa6fa97e59e0ea
Closes-Bug: #1290443
Merge "Use wildcard for keystone log files"
Merge "Install guide fixes for ceilometer"