remove Dcmgr.conf from dcmgr/bin.
remove Dcmgr.conf from dcmgr/lib/dcmgr/endpoints.
remove Dcmgr.conf dependency from models: backup_object, image, load_balancer, volume
rename dataset method: lives -> alives
remove Dcmgr.conf from dcmgr/node_modules.
remove Dcmgr.conf from models: host_node, ip_lease, mac_lease

Those classes handles new IP/mac address from configuration parameter.
It needs further refactoring to handle the operation out of model class.
remove Dcmgr.conf from storage drivers.
remove Dcmgr.conf.
Merge pull request #433 from axsh/suppress-dcmgrconfig-warn

Suppress dcmgrconfig warn