Adds Initial Logging Support

Previously, logging was hard coded into the nova and neutron
containers. This patch creates two common params for logging:

DEBUG_LOGGING
VERBOSE_LOGGING

and sets default values of verbose=true and debug=false. This patch
implements logging for Nova and Neutron. Add'l OS service config
scripts and images will need to be updated to use the logging
params.

Change-Id: I03d48005d5b4789aa3c519879a20d963ef1cbaa3