The installation is done from source in a virtualenv for
a system user. master branch was used.
* Tested on: Ubuntu 14.04, Ubuntu 16.04, Centos 7,
openSUSE Leap 42.1 and Debian 8
* Add init scripts for Ubuntu 14.04
* Add systemd units for Ubuntu 14.10 or higher,
RHEL/Fedora/Centos and openSUSE Leap 42.1
* Add: verify that magnum services are running
* Add: links to dependency install guides
* Add: setup log rotation
Change-Id: I0b8a25916734a208b80456c253339974d9423ad6
Partially-Implements: blueprint magnum-installation-guide