Use RFC 5737 IP addresses and RFC 2606 domain names in all
unittests, docs, qa and docstrings.

Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Two new resources are added:
- /2/instances/$name/prepare-export
- /2/instances/$name/export

The documentation for the existing resource for creating instances is updated
for remote imports. The RAPI client is extended for the new resources.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

As mentioned in commit d975f482, the current way of creating an
instance via RAPI is not very flexible. With this patch, a new
instance creation request data format is introduced and documented.
Support can be detected by checking the list of features returned
by the /2/features resource for the value "instance-create-reqv1".

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>