Add /etc/hosts and /etc/pip.conf to files retrieved for diagnostic
Add /etc/hosts and /etc/pip.conf to files retrieved for diagnostic

Change-Id: I6b3c81c93f126e85e560a445c276425a562711f9

openstack/packstack,openstack/packstack,stackforge/packstack,fr34k8/packstack,openstack/packstack,stackforge/packstack,stackforge/packstack,fr34k8/packstack,mahak/packstack,mahak/packstack,mahak/packstack,fr34k8/packstack