CBQE-1107: add getr tests

Change-Id: I47d84e8c25ab3270cb3dd9daab1eafad6b7feaeb
Reviewed-on: http://review.couchbase.org/25362
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Deepkaran Salooja <deepkaran.salooja@globallogic.com>