Change default policy for volume_extension:volume_tenant_attribute

The volume_tenant_attribute extension should be accessible by
the owning tenant and the admin. Change default policy from
'rule:admin_api' to 'rule:admin_or_owner'.

Change-Id: I886cd717741c86b5083aeaf16e3e7ea5b4e525b4
Closes-bug: #1269312
Nexenta iSCSI driver: fixed volume_migration

Fixed volume_migration updating volume provider_location.
Fixed temporal snapshot deleting after volume migrated.

Change-Id: Id23749cb3724e1510865425232b38b9fc32690f8
Closes-Bug: #1263258
Fix FC connection handling in the storwize driver

Creating FC connections was not working due to several issues:

1. The lsfabric command in the Storwize/SVC omitted the delimeter and so
the output was not correctly parsed by the driver.
2. In some cases comparisons of WWPNs were not case insensitive - ensure
we compare lower-case WWPNs.
3. If the host supplied extra information in the connector (e.g. iSCSI
initiator name in case of an FC setup, or FC WWNNs/WWPNs in an iSCSI
setup), the driver would try to make those host mappings on the storage
too.  This could lead into unwanted behaviour and confusing error
messages (for example, in an FC setup reaching the maximum number of
iSCSI mappings).

In addition, unit tests weren't properly testing FC - instead they were
always testing iSCSI due to an error in parsing extra_specs. This patch
fixes that error and the unit tests as well.

These changes must all be made together for unit tests to pass.

Closes-bug: 1279758
Change-Id: I64e21609ba089cf5bfd52ce2644f6f229bcc69dc
Fix webob.exc.HTTPForbidden parameter miss

HTTPForbidden should use the parameter 'explanation'
instead of 'detail'.
This patch fixes this bug.

Change-Id: I688145f7ea942277c7d3ed3221d6ff2bc7a852ad
Closes-Bug: #1283872
Merge "Fix webob.exc.HTTPForbidden parameter miss"
Merge "Fix FC connection handling in the storwize driver"
Merge "Change default policy for volume_extension:volume_tenant_attribute"
Merge "Nexenta iSCSI driver: fixed volume_migration"