Fix existing spelling errors

Change-Id: Ie689cf5a344aaa630a4860448b09242333a8e119

This is to fix the duplicated words issue like
"Other services that are are out of scope of this".

Change-Id: Ie4882dbb64d6e8774888b97895af20ba3855f0f8

An initial specification of the internal TLS implementation for kolla,
describing https://etherpad.openstack.org/p/kolla-internal-tls and
https://blueprints.launchpad.net/kolla-ansible/+spec/add-ssl-internal-network

Change-Id: I5a42226b724affad2dc12390e345336f375c7a57