Documentation typo fixes
Documentation typo fixes

Change-Id: Ib82fc29c9714ae7e661dff6630c0b44f3c443bad

dmsimard/instack-undercloud,bcrochet/instack-undercloud,dpkshetty/instack-undercloud,dpkshetty/instack-undercloud,rdo-management/instack-undercloud,eprasad/instack-undercloud,dmsimard/instack-undercloud,eprasad/instack-undercloud,bcrochet/instack-undercloud,rdo-management/instack-undercloud