Create flavor-access for the tenant when creating
a private flavor

In FlavorManage extension, a change has been made to
create flavor-access for a corresponding tenant on
creating a private flavor

This also requires the api-samples for flavor-access
to be changed, since there will be a flavor-access created
by default on creating a private flavor

This commit has a DocImpact

Change-Id: I7795fbd04ae9fc8b1ea6fb27203dfa5217d310ce
Fixes: bug 1209101
Merge "Create flavor-access for the tenant when creating a private flavor"
xenapi: refactor: move UpdateGlanceImage to common

During the review of https://review.openstack.org/41651 it was
recommended to move UpdateGlanceImage to a common library. A bug was
filed to deal with the refactors. This change fixes the first part.

Fixes bug 1220596

Change-Id: I95ae89525b7e6768c5a70364945d5a10cb906d88
XenAPI: Fix translation of metadetails in aggregates

https://review.openstack.org/#/c/43157/ added a translation from the sqlalchemy model to
the instance object replacing metadetails with metadata.

This added more traces in general for XenAPI (when we queried whether we were using
aggregates) and actually broke the host aggregate functionality

Change-Id: I87195753931945b6e1ecf75bc81575a6fa03068e
Closes-bug: 1232179
xenapi: post install scriptlet to rpm

A post install script that creates the /images directory on xenserver,
and sets up the trust relationship.

Change-Id: Id57e3a3ab2782550468c6aa4c01059ceb7cc81ab