Fixes a small typo

In the install-guide, the creating service endpoints part should
be 'Create the X service endpoints'. Also fixes some other
related consistency issues.

Change-Id: I0355801afe00e796287406315ecaa804b355e1c4
Closes-bug: #1405328
Co-Authored-By: Matt Kassawara <mkassawara@gmail.com>
backport: juno
(cherry picked from commit 2fc7ba5fd032e8fdae7df70be0a7a7bd141f7948)