cache in _get_agents_by_type
cleanup only ports of this node

Conflicts:
	deployment/puppet/quantum/files/ocf/quantum-agent-dhcp
	deployment/puppet/quantum/files/ocf/quantum-agent-l3
Rescheduling Networks to another DHCP agent

* refactor calls to Quantum API
* add --remove-dead. remove dead agents after rescheduling
* healthy check for dhcp agent (trough API)
* rescheduling networks after succeffuly start agent (in ocf-script)
start work on l3-rescheduling
l3-reschedule-method
arders and warnings
new parametres in quantum.conf + sleeps and logs for rescheduling
debug text