Add exclude list to not override user data
Add exclude list to not override user data

Add an exclude list of file which can possibly
contains user data.
When those files are modified by the user, we should
not erased those when we update the plan during the
upgrade

Change-Id: I4e53d8f95170c25b32a6d714a7620c2c9d2596f3
Closes-Bug: #1734108

openstack/tripleo-common,openstack/tripleo-common