Adds pipeline hints to the example paste config

The order of entries in the pipeline matters. The is especially true for
the application. It must always come last. None of the configuration
documentation for extensions calls this out when they tell the user to
add something to their pipeline.

Change-Id: I46b9b1ac59865d996caa4174867bcf54318035a3
Closes-Bug: #1363932
Merge "Adds pipeline hints to the example paste config"