Use CMS to generate sample tokens

This is preparing for compressed tokens.  We don't want anything in the
keystone server tree that assumes it knows the formats of the token.
This uses the CMS code to preduce the sample data.

Change-Id: I6bf9c0f8df2e2e6d53fef4ecbcca87b9f9af4e6b
Merge "Use CMS to generate sample tokens"