Open Mitaka development
Open Mitaka development

Bump pre-version in setup.cfg to formally open Mitaka development.
Liberty stable branch will be cut from the previous commit.

Change-Id: I7f4867a3168cf5a318438febed87c0b1510c86bd

mahak/nova,klmitch/nova,mikalstill/nova,hanlind/nova,raildo/nova,alaski/nova,jianghuaw/nova,gooddata/openstack-nova,klmitch/nova,sebrandon1/nova,CEG-FYP-OpenStack/scheduler,vmturbo/nova,BeyondTheClouds/nova,openstack/nova,dims/nova,jianghuaw/nova,Juniper/nova,raildo/nova,sebrandon1/nova,zhimin711/nova,gooddata/openstack-nova,rahulunair/nova,NeCTAR-RC/nova,Juniper/nova,vmturbo/nova,edulramirez/nova,rajalokan/nova,gooddata/openstack-nova,cyx1231st/nova,vmturbo/nova,gooddata/openstack-nova,bigswitch/nova,phenoxim/nova,BeyondTheClouds/nova,apporc/nova,fnordahl/nova,rahulunair/nova,openstack/nova,TwinkleChawla/nova,phenoxim/nova,klmitch/nova,klmitch/nova,rajalokan/nova,cloudbase/nova,noironetworks/nova,noironetworks/nova,apporc/nova,cyx1231st/nova,fnordahl/nova,mikalstill/nova,cernops/nova,mikalstill/nova,openstack/nova,TwinkleChawla/nova,rahulunair/nova,cernops/nova,rajalokan/nova,sebrandon1/nova,jianghuaw/nova,devendermishrajio/nova,mahak/nova,edulramirez/nova,devendermishrajio/nova,Juniper/nova,cloudbase/nova,CEG-FYP-OpenStack/scheduler,hanlind/nova,BeyondTheClouds/nova,rajalokan/nova,mahak/nova,vmturbo/nova,zhimin711/nova,alaski/nova,jianghuaw/nova,bigswitch/nova,hanlind/nova,cloudbase/nova,dims/nova,NeCTAR-RC/nova,Juniper/nova,cernops/nova