Under the section for Oz located in the Tool support for image
creation of the OpenStack Virtual Machine Image Guide, the text
used in the link referencing the Github page where examples of
Oz templates can be found is wrong. Users are redirected to
rcbops/oz-image-build/tree/master/templates where the source code
is currently being maintained but link in the docs references
that the Oz templates are located at the following Github
address:rackerjoe/oz-image-build/templates
This fix updates the refence text for the link with the correct
Github account
Change-Id: I2f36d6337fb12df291fa58d84264dd6e2dc0aa8d
Closes-Bug: #1618692