MB-31510 Use checkXX macros instead of using check (ep_testsuite_dcp)
MB-31510 Use checkXX macros instead of using check (ep_testsuite_dcp)

Changed tests in ep_testsuite_dcp to use
checkeq, checkne, checkgt, checkge, checkle and checklt.
Instead of check and boolean expressions. As these macros
provide values in failure messages.

Change-Id: I4362ba6feb6178428fedcb67f2cb8ae1b9a8137a
Reviewed-on: http://review.couchbase.org/100623
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

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