CLOUDSTACK-7727 Skip various BVT tests on LXC

A number of BVT tests are not valid for LXC (e.g. migrating a VM), so this patch
ensures they skip if LXC is in use.

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7731: UI > Infrastructure > Virtual Routers > group by zone/pod/cluster view > listView > detailView > add View All link (i.e. "View all Virtual Routers").
CLOUDSTACK-7731: UI > Infrastructure > Virtual Routers > group by account view > listView > detailView > add View All link (i.e. "View all Virtual Routers").
CLOUDSTACK-7736: UI - listView widget - select view dropdown on top of listView - prefilter() - include original args.context when passing it to prefilter().
CLOUDSTACK-7731: UI > Infrastructure > Virtual Routers > group by XXXXXXX view > listView > detailView > add View All link > not show "group by XXXXXXX" in select view dropdown.
CLOUDSTACK-7731: UI > Infrastructure > Virtual Routers > group by XXXXXXX view > listView > detailView > add View All link > show read-only text "group by zone/pod/cluster/account" in select view area.
fix kvm issue, for windows sever 2008, it will crash without hyperv enlightment featre enabled
CLOUDSTACK-7744: UI > Instances > detailView > Change Service Offering > show generic notification.
There are few cases that mgt server won't reponse agent's pingcommand timely, or in KVM's case, libvirt won't repsonse in few mintues, which will cause agent reconnect to mgt server, then all the on going tasks on host will fail
Added /cloudstack/tools/appliance/packer/ directory and various packer build files.
Replaced cloud-early-config.sh with test version
CLOUDSTACK-7749: AsyncJob GC thread cannot purge queue items that have been blocking for too long if exception is thrown in expunging some unfinished or completed old jobs, this will make some future jobs stuck.
CLOUDSTACK-5576: UI > IP Address > EnableVPN, DisableVPN: change label.
Changes to cssysvm_template.json to try to correct problems with preseed.cfg http access during the beginning of packer build.
Merge remote-tracking branch 'origin/master' into FEATURE-CENIK123-v1.1
CLOUDSTACK-7754: Templates source_template_id is null when it is created from Snapshot with its corresponding volume removed. Fix it by searching for volumes including removed.
Revert "fix kvm issue, for windows sever 2008, it will crash without hyperv enlightment featre enabled"

This reverts commit c9dcae548056aa477e4156a1ec2efc9a83813aed.
Revert "There are few cases that mgt server won't reponse agent's pingcommand timely, or in KVM's case, libvirt won't repsonse in few mintues, which will cause agent reconnect to mgt server, then all the on going tasks on host will fail"

This reverts commit f3e91bf26acaeb1202e1fa84b70ad24db3a0eace.
Update from pulls
CLOUDSTACK-7761:

Revert "when system VM ping times out, stop system VM"

This reverts commit ee23be1942001ab732cfb3ad50fa24163cb88a48.