Make savanna-db-manage able to discover configs
Make savanna-db-manage able to discover configs

By passing project to the oslo.config parser, we're enabling several
locations to the list of auto discoverable configs:

* /etc/savanna.conf
* /etc/savanna/savanna.conf
* ~/savanna.conf
* ~/savanna/savanna.conf

Change-Id: I03d112c96c01607bb00f1a86ae8238f3fa4700de
Closes-Bug: #1202227

matips/iosr-2015,esikachev/scenario,zhangjunli177/sahara,citrix-openstack-build/sahara,crobby/sahara,ekasitk/sahara,keedio/sahara,ekasitk/sahara,egafford/sahara,henaras/sahara,openstack/sahara,henaras/sahara,crobby/sahara,esikachev/scenario,matips/iosr-2015,mapr/sahara,tellesnobrega/sahara,xme1226/sahara,openstack/sahara,xme1226/sahara,citrix-openstack-build/sahara,matips/iosr-2015,zhujzhuo/Sahara,xme1226/sahara,bigfootproject/sahara,henaras/sahara,redhat-openstack/sahara,tellesnobrega/storm_plugin,zhujzhuo/Sahara,esikachev/scenario,esikachev/sahara-backup,crobby/sahara,tellesnobrega/sahara,redhat-openstack/sahara,mapr/sahara,tellesnobrega/storm_plugin,bigfootproject/sahara,egafford/sahara,mapr/sahara,zhujzhuo/Sahara,ekasitk/sahara,esikachev/sahara-backup,bigfootproject/sahara,redhat-openstack/sahara,keedio/sahara,keedio/sahara,tellesnobrega/storm_plugin,esikachev/sahara-backup,zhangjunli177/sahara,zhangjunli177/sahara,citrix-openstack-build/sahara