Logging module cleanup
Logging module cleanup

Replaced logging with openstack.common.log
Removed imports where logging is not used

Fixes bug #1095541

Change-Id: I5b03d9697dde3ef3520f67d1d8166f7af7689551

CiscoSystems/networking-cisco,hareeshpc/networking-cisco,openstack/networking-cisco,Tehsmash/networking-cisco-apic,Tehsmash/networking-cisco,Tehsmash/networking-cisco-nexus,Gitweijie/first_project,cisco-openstack/networking-cisco,Gitweijie/first_project,noironetworks/networking-cisco,hareeshpc/networking-cisco,CiscoSystems/networking-cisco,noironetworks/networking-cisco,cisco-openstack/networking-cisco,Tehsmash/networking-cisco,nikolay-fedotov/networking-cisco,openstack/networking-cisco