MB-6972:  use new key-pair:  KEY=805A4A3A

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pub   2048R/805A4A3A 2014-09-03 [expires: 2019-09-02]
uid                  Couchbase Server (relax) <support@couchbase.com>
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sec   2048R/805A4A3A 2014-09-03 [expires: 2019-09-02]
uid                  Couchbase Server (relax) <support@couchbase.com>

Change-Id: Ie7d6c2ba567480fbf6e576b482ef302bae785804
Reviewed-on: http://review.couchbase.org/41160
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>