This avoid the software instance to be updated by bang().

This avoid other tests doing Tic to fail.

The update of sale packing list during the title changing was removed in
3cd96faf because it was not needed.

software_instance_tree table.

The new root of the tree isn't root_software_instance anymore
but hosting_subscription.

Modify HostingSubscription_requestRootSoftwareInstance in order to avoid starting/stopping a destroyed computer partition.

Modify HostingSubscription_requestRootSoftwareInstance in order to pass testVifibSlapBang.test_computer_bang_not_called_on_partly_destroyed_tree

It is not allowed to access to collections.deque in a python script.
Let switch back to poor man queue using python native lists.

This reverts commit 18060ee5.

Conflicts:

	master/bt5/vifib_base/bt/revision

Check connection from root hosting subscription instead of root software instance in SoftwareInstance_requestSoftwareInstance

Add root_software_release_url property on Hosting Subscription in order to store the requested software_release.

Add root_state_property on Hosting Subscription in order to store to which state the root instance was requested.