Remove paste configuration details to a seperate file. blueprint use-common-cfg
Remove paste configuration details to a seperate file.
blueprint use-common-cfg

In addition this ensures that the cisco extension units are working
with the common cfg code.

Change-Id: I8c1f81e295e7ed593f0b58885efeeb15339b7733

openstack/networking-mlnx,moshele/networking-mlnx,openstack/networking-mlnx,moshele/networking-mlnx-master,stackforge/networking-mlnx,stackforge/networking-mlnx