There is a race condition that can cause the force-replace test case
in the verify_dynamic_ring test to fail. This issue is being tracked
by riak_core issue #570. This changes replaces the force-replace
testing with another resize test. Once issue #570 is resolved this
change can be reverted.
test may fail because of recent default change + systest_read not supporting
siblings. Since I can't recreate it, and it doesn't matter for the test, turn
it off.
