CBQE-1119: testAddRemoveNodes and testInfoCommands tests

Change-Id: I8b82d6c1d1f2e5dceb7f07c85e5cb73949936ca2
Reviewed-on: http://review.couchbase.org/25704
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>