XenAPI: Always update proxy settings

If a user wants to re-use an xva just with different proxy settings, he
can now do it, as this change will always update /etc/apt/apt.conf to
reflect the settings in the user's localrc.

Change-Id: I8a6e9c88304bc887ea8269d946e89a5ba258b126
Configure glance CA certificate path in cinder

A new configuration option is available in cinder for setting
the CA path. Configure this option in devstack when native SSL
or TLS proxy is configured.

Change-Id: I2cf9a3b8ba8e4896bd98efe0fb6f7d62fb279d90
Closes-Bug: 1384267
Fix a minor comments

A minor mismatch in lib/neutron since now unstack.sh invokes
three functions and also start_neutron_agents() is called before
create_neutron_initial_network().

Change-Id: Ibbe68501cce4c062a9ac610cbc44188dc9bab6c8
Desupport neutron openvswitch and linuxbridge monolithic plugins

These plugins were removed in Juno.
Note: this doesn't affect the corresponding ML2 mechanism drivers.

Partial-Bug: #1323729
Change-Id: Ia8da1e20a03fef5657ba1584bf83ddd224b5d5f2
correct templated catalog driver class

Now the templated catalog driver class "TemplatedCatalog" is removed
in this patch https://review.openstack.org/#/c/125708/2 use
"keystone.catalog.backends.templated.Catalog" instead.

Change-Id: Ib9c8ea557e7171ff0c78a1e10d752ed564aff9e7
Closes-Bug: #1386562
Stop setting deprecated OVS.enable_tunneling option

The option has been deprecated in IceHouse and now being removed.

Related-Bug: #1195374
Change-Id: I38d962551173892144c369df71e0524b43e1fc89
XenAPI: move Neutron plugin install to domU

Use the same mechanism as used for nova plugin installation, thus
avoiding the need for variables in dom0. This change will also help to
move XenServer CI to neutron in the future, as the dom0 part of the
script is not executed there.

With this change, the neutron related network will always be created and
attached even if the user wants to use nova-network.

Change-Id: I8669c94e9f0aacce2990469dbabde1ff702a2769
XenAPI: Remove non-used functions

Remove the no-longer used functions that were used to download plugins
to dom0.

Change-Id: I8dfd476781b683a8378efdae45d3cb1b46e7063c
XenAPI: workaround for unsupp. associative arrays

Dom0's bash does not support associative arrays, however we source
`functions` and therefore our scripts fail. This change breaks the
dependency of dom0 tools on domU functions.

Fixes bug: 1379804

Change-Id: I229e2d5f07070a9236ec612d4032c94c4361a9f6
Merge "Fix a minor comments"
Merge "XenAPI: Always update proxy settings"
Merge "correct templated catalog driver class"
Merge "Configure glance CA certificate path in cinder"
Merge "XenAPI: move Neutron plugin install to domU"
Merge "XenAPI: Remove non-used functions"
Merge "XenAPI: workaround for unsupp. associative arrays"
Merge "Desupport neutron openvswitch and linuxbridge monolithic plugins"
Merge "Stop setting deprecated OVS.enable_tunneling option"