Enhance uninstall_contrail to support ubuntu
	support per role/node uninstall

Change-Id: I46b73e22e02492240b138b0dc330cf641bc06f5a
Upgrade fix for 1.10 to 1.20 upgrade
	Need not setup roles, instead restarting the services is sufficent.
	backup confg file and restore after upgrade
	Add contrail-openstack-ha package to upgrade list in case of HA setup.

Change-Id: I76c139cddc3d1801e5d349994207eb29f3418015
Merge "Enhance uninstall_contrail to support ubuntu 	support per role/node uninstall" into R1.10