add ep_num_value_ejects to base report

Change-Id: I83d8e7a6cd5b71e269fa6b1f162839badbc7a53d
Reviewed-on: http://review.couchbase.org/28601
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>
Tested-by: buildbot <build@couchbase.com>