[BP] Removing exp_nru_value from dcp_stream tests
[BP] Removing exp_nru_value from dcp_stream tests

While streaming items through DCP, nru value is 2 only if items
are streamed from disk. So we cannot have exp_nru_value as a
mandatory check.

*Saw test failures related to this on sherlock occasionally.

Change-Id: I230bb659178bb4acb065941204159386e5f1bd83
Reviewed-on: http://review.couchbase.org/51064
Reviewed-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>
Tested-by: Manu Dhundi <158873d90a7ef40f3637a222b7329c09d0222554@couchbase.com>
Reviewed-on: http://review.couchbase.org/51876
Tested-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>

daverigby/ep-engine,membase/ep-engine,teligent-ru/ep-engine,hisundar/ep-engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,membase/ep-engine,owendCB/ep-engine,owendCB/ep-engine,owendCB/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,daverigby/ep-engine,couchbase/ep-engine,daverigby/ep-engine,daverigby/kv_engine,daverigby/ep-engine,hisundar/ep-engine,couchbase/ep-engine,membase/ep-engine,couchbase/ep-engine,couchbase/ep-engine,membase/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine