Restore VMware unit tests

[Salvatore Orlando]

As plugin decomposition is still in progress, vmware unit tests should be unskipped.

In order to complete advanced services spin off they were completely disabled.
In order to reenable these tests, the 'advanced services' NSX plugin must be removed.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/142515

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/142515
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=5981b9c11651589a0ed0ae4844f9284da84bab27
Submitter: Jenkins
Branch: master

commit 5981b9c11651589a0ed0ae4844f9284da84bab27
Author: Salvatore <email address hidden>
Date: Wed Dec 17 23:09:24 2014 +0100

    Remove NSX 'service' plugin

    Following the spin-off for Neutron advanced services, this plugin
    has become non-functional.
    This patch removes the plugin, the service drivers, the database
    models which kept tracking of resource associations, exceptions,
    and obviously unit tests.

    As there were some extensions which were leveraged only by this
    plugin, they are being removed as well. In particular, one of
    these extensions, 'routed-service-insertion' was in the
    neutron.extensions package rather than neutron.plugins.vmware
    package. This was for historical reasons. As no other plugin is
    using this extension, it is being removed as well with this
    patch.

    By removing this plugin vmware the temporary skips applied to
    neutron unit tests can be lifted. This patch does this.

    Closes-Bug: #1403585

    Change-Id: I0717f955b0f787c2951cb9db44ea5decc5d3dff0