CLOUDSTACK-6873: Removing BugId from tests
CLOUDSTACK-7121: Make IPv6 preference over IPv4 configurable

Also set the logging to info instead of debug
Fixing test_escalations_ipaddresses.py - Passing type Isolated while listing Networks to avoid inclusion of shared networks in the list
Fixed test_escalations_instances.py - Stop VM before detaching root volumes
Fixing missing attribute issue in test_stopped_vm.py
CLOUDSTACK-7205: Adding expunge=True while deleting VM for test case execution speed improvement
CS-19072: got rid of unneeded type casting when apply pagination to different resources