Rename MB19981TestDeleteWhileClientConnectedAndEWouldBlocked
Rename MB19981TestDeleteWhileClientConnectedAndEWouldBlocked

Rename the test to DeleteWhileClientConnectedAndEWouldBlocked and
update the description to match the current implementation of the
logic on the server as we no longer use the old state machinery.

Change-Id: I67c957067e9c4de105e17d1b465bd923edda4453
Reviewed-on: http://review.couchbase.org/c/kv_engine/+/131321
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