Fix misspellings in tripleo-image-elements

Fix misspellings detected by:
* pip install misspellings
* git ls-files | grep -v locale | misspellings -f -

Change-Id: I45fbfe7efd6ec23d0b9d8bc0134e073e1785b605
Closes-Bug: #1257295
Neutron keystone-signing dir should be 0700...

The permissions on the signing dir should be 0700 not 0770.

This fixes a WARN message from auth_token:

 keystoneclient.middleware.auth_token [-] signing_dir mode is 0770
 instead of 0700

Change-Id: Ie67a97ba9ba21b1bb2aa184a3aa37063ac08b6c1
Use rfc compliant example data in hosts element.

Change-Id: I88d5d234ed4fd519de1841980254ce98b1c97a49
Merge "Fix misspellings in tripleo-image-elements"
Merge "Neutron keystone-signing dir should be 0700..."
Merge "Use rfc compliant example data in hosts element."