Install Guide edits

Edits while testing for openSUSE and SUSE Linux Enterprise:
* Remove wrong line wrapping for screen in section_cinder-controller.xml
* indent second lines of commands in section_cinder-controller.xml
* Remove wrong line wrapping for screen in section_cinder-node.xml

Change-Id: I2d6e1aeff2725f8461e5410b0d2e2b75e61d8d85
neutron-ovs-cleanup automatically runs on Ubuntu

As of the Icehouse release, Ubuntu packages automatically run
the neutron-ovs-cleanup tool on reboots prior to l3 and dhcp agents
starting.

Change-Id: I9e917f9fe3b60ec62496562499ab249b832c0768
Merge "neutron-ovs-cleanup automatically runs on Ubuntu"