Jimmy McCrory 8019b5c190 Remove keystone_token_driver variable
The memcache token driver was removed in Ocata and the only valid option
is sql, which is only used when keystone_token_provider is uuid.

Change-Id: I1db15e2553893b74d3f7d57d4d50ca2052be04e4
2017-11-28 10:35:03 -08:00
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