Renamed variables. Moved sending flow mod failures to SoftwareSwitch
fixed mixup in renaming. Refactored so flow_mod_failures and delayed_flow_mods can be used separately. Delegated failures of flow mods to an external function
Revised comments, switched barrier_deque to a list
moved flow_mod failures to be determined by fuzzer. got rid of self.cmd_queue ivar in FuzzSoftwareSwitch