FAB-1713 add event stream port to test fixture
FAB-1713 add event stream port to test fixture

this is in anticipation of the event hub support being revived for
node.js sdk. the test fixtures need to be updated to use the event
stream on port 7053

Change-Id: I527373b822a640fad0ba518a5cbeb97a22b09106
Signed-off-by: Jim Zhang <6775950e159d0bc2e58935ca2201ba88526dddf0@us.ibm.com>

adityachap/fabric-sdk-node,ratnakar-asara/fabric-sdk-node,adityachap/fabric-sdk-node,ratnakar-asara/fabric-sdk-node,ratnakar-asara/fabric-sdk-node,ratnakar-asara/fabric-sdk-node