Support IPv6 when booting instances

When nova uses neutron, IPv6 addresses may be allocated.  This ensures
those addresses are supported.the patch to modify nova is
https://review.openstack.org/#/c/74252/

Change-Id: I2468d3bcaca9122e5d3f9c98044d57f623630dc3
Closes-bug: #1267685
Sync with Oslo-Incubator

oslo-incubator HEAD was 2eab986ef3c43f8d1e25065e3cbc1307860c25c7

This change brings in a few minor updates to python3 and a bug fix
for deep copy failure in gettextutils.

Change-Id: Id360f3b43d1ad2f67b328206990dd6bdb53c1cd7
Allow admin user to get all tenant's floating IPs

When getting floatingips with Nova API, the results will be filtered
with the 'tenant_id'.
So, we can only get the floatingips belonging to the tenant of the current
context.
When ceilometer invokes novaclient to list floatingips, it will get an
empty list because the tenant is 'service'.
we should allow an admin user to index all tenants's floatingip by adding a
parameter 'all_tenants'.
This patch provides CLI support

Change-Id: I35a2155401247d49017bf3c03341b082cb87750d
Closes-bug: #1262124
Add service-delete subcommand to delete a service

In nova https://review.openstack.org/#/c/39998/ expose an API to delete
a service. Both in V1.1 and V3.

This patch make novaclient support it.

Change-Id: I4aaabc866b464c046b46eda68734f37223c6d6a0
Implements: blueprint support-delete-service
Fix name arg help for volume-type-create

Similar to change I10b1bd6d but for help on an argument rather than the
command itself.

Closes-Bug: #1304570

Change-Id: I4f08ffb6af248ccd7446012765d17c41567f4b38
Merge "Allow admin user to get all tenant's floating IPs"
Merge "Fix name arg help for volume-type-create"
Merge "Add service-delete subcommand to delete a service"
Merge "Support IPv6 when booting instances"
Merge "Sync with Oslo-Incubator"