CBQE-0: fail NodeInitializeTask if info.mcdMemoryReserved == 0

recently i see many such tests where mcdMemoryReserved is defined as 0
test hangs:
http://qa.hq.northscale.net/job/centos_x86--07_01--Rebalance_tests_TAP-P0/4/consoleFull
[2014-04-07 17:20:48,791] - [rest_client:739] INFO - pools/default params : memoryQuota=0&username=Administrator&password=password

Change-Id: Idc2ecf4934716578b584e499495c5950236d3e8a
Reviewed-on: http://review.couchbase.org/35452
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>