MB-37096: Increase memcached_testapp discovery timeout to 60s
MB-37096: Increase memcached_testapp discovery timeout to 60s

When using the Debug build type on Windows, the time taken to discover
GoogleTest test cases seems much slower; the 30s timeout is frequently
hit on our Windows CV machines.

Increase the timeout to 60s.

Change-Id: I72d0997e77671b80c005739d6053d01a135dcaa1
Reviewed-on: http://review.couchbase.org/121415
Well-Formed: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Jim Walker <1cd02e31b43620d7c664e038ca42a060d61727b9@couchbase.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine