MB-12913: Initial centos-65 docker image

CentOS 6.5 allows us to use the pre-compiled GCC 4.8.2 (C++11
compliant) from devtools [http://people.centos.org/tru/devtools-2/].

This Dockerfile cxloned from the 6.3 image; with updated base
'naked-centos:6.5'

Change-Id: Id32cfc9d76e753abc988a635a1b5f0e14b994bd9
Reviewed-on: http://review.couchbase.org/44463
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Dave Rigby <daver@couchbase.com>