use 3.0 manifest for R14 testing

Change-Id: Ic9e7cb6c66f86b9c10f1d934c6514ab23bde5879
Reviewed-on: http://review.couchbase.org/38855
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>
Tested-by: Pavel Paulau <pavel.paulau@gmail.com>