authz: mark tserver flag non-experimental
authz: mark tserver flag non-experimental

This is a follow-up to b03411c, wherein master-side authorization flags
were marked non-experimental.

Change-Id: I2315e0d65f271608da0e5a80ea543da6e35aa253
Reviewed-on: http://gerrit.cloudera.org:8080/13225
Reviewed-by: Alexey Serbin <864f6b82bd94e8dda64141d4274519ee66e0102e@cloudera.com>
Reviewed-by: Adar Dembo <866ca730bfc7f544e3ebce604ceeba4879f23df0@cloudera.com>
Tested-by: Andrew Wong <b68e4fdc6430321a6b47400732ff97d7ae91234e@cloudera.com>

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