CLOUDSTACK-7877: The NET.IPRELEASE events are not added to usage_event on IP range deletion from Physical Networks.

Signed-off-by: Jayapal <jayapal@apache.org>
CLOUDSTACK-7642. Class not found exception after upgrading from 4.3 to 4.5 on a
XenServer hypervisor setup. The resource path has changed for xenserver resources
in 4.5. On an upgraded setup the db entries in host table for the resource path
needs to be updated. Made a fix in the upgrade script.
CLOUDSTACK-7860: test_eip_elb.py - Move Netscler info out of the test case. Read it from config. Fix attribute error. Fix pep8 issues. Fix imports.

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7885 : Fixed the script '/maint/test_vpc_host_maintenance.py'

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7355 - test_netscaler_configs.py uses hardcoded NetScaler credentials

Refactored code to use test_data instead of hardcoded NetScaler credentials
Refactored code to remove large scale duplication
Fixed some minor logic error in the existing tests

This patch has not added or removed any of the original test-cases.

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>