EPEngine:initialize: Log the config string from ns_server
EPEngine:initialize: Log the config string from ns_server

Aids in debugging / testing.

Change-Id: I871629639c54f8efd202634ad804b9bfd607495f
Reviewed-on: http://review.couchbase.org/76553
Reviewed-by: James Harrison <5c25a7b3db09830813688775bfc8e6de736a230c@couchbase.com>
Reviewed-by: Manu Dhundi <158873d90a7ef40f3637a222b7329c09d0222554@couchbase.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

membase/ep-engine,daverigby/kv_engine,membase/ep-engine,couchbase/ep-engine,membase/ep-engine,daverigby/kv_engine,membase/ep-engine,daverigby/kv_engine,daverigby/kv_engine,couchbase/ep-engine,couchbase/ep-engine,couchbase/ep-engine