Add openSUSE/SLES Neutron instructions

Change-Id: I5e75666ec102585e69755e7b44aaced1fb6cabce
Misc improvements to cinder chapter

Change-Id: I0e44057d4e2f06238030d5a34503df11f3f6068f
Merge "Misc improvements to cinder chapter"
Merge "Add openSUSE/SLES Neutron instructions"