Solved network validation memory leak.
Added 3 function to check network address range intersection.
fixed get_min_max_addr return type
added test
Satisfying pep8
Satisfying pep8 fix
only half of ip address range goes to public and floating  ranges , to satisfy health-check conditions.
netmask expanded to full /24, and added couple of comments
fixed size of public/floating network
fixed test in test_cluster_changes_handler to accommodate cahnges in network configuration
last test fixed