For drivers that support tagging/metadata (openstack, aws, azure),
Add or enhance support for supplying tags for uploaded diskimages.
This allows users to set metadata on the global diskimage object
which will then be used as default values for metadata on the
provider diskimage values. The resulting merged dictionary forms
the basis of metadata to be associated with the uploaded image.
The changes needed to reconcile this for the three drivers mentioned
above are:
All: the diskimages[].meta key is added to supply the default values
for provider metadata.
OpenStack: provider diskimage metadata is already supported using
providers[].diskimages[].meta, so no further changes are needed.
AWS, Azure: provider diskimage tags are added using the key
providers[].diskimages[].tags since these providers already use
the "tags" nomenclature for instances.
This results in the somewhat incongruous situation where we have
diskimage "metadata" being combined with provider "tags", but it's
either that or have images with "metadata" while we have instances
with "tags", both of which are "tags" in EC2. The chosen approach
has consistency within the driver.
Change-Id: I30aadadf022af3aa97772011cda8dbae0113a3d8
916d62a374