Add options for auto MAC and ARP setup.
Auto MAC setup sets each host MAC equal to its DPID, which simplifiesdebugging.
Auto ARP setup removes the need for broadcast support for ARP, whichenables a smaller NOX controller.
Increase createLink retry count
Was seeing occasional errors with tests run back-to-back.
Add MAC auto set for switches
Also use indexing for DPIDs to avoid zeroed MAC
Move fixLimits function to util
Move utility functions out of mininet.py
Having a file with the same name as its package creates hard-to-diagnoseimport error, so rename mininet.py to net.py. This commit moves utilityfunctions, generally those dealing with network namespaces and interface...