This patch adds full traceback to ExceptionPayload in versioned
notifications.

The instance fault field and instance-action REST API has already
provide the traceback to the admin users (controlable through policy)
and the notifications are also admin only things as they are emitted
to the message bus by default. So it is assumed that security is not
a bigger concern for the notification than for the REST API.

On the ML [1] post there was no objection to add new string field to the
ExceptionPayload that will hold the serialized traceback object.

[1] http://lists.openstack.org/pipermail/openstack-dev/2018-March/128105.html

Implements: blueprint add-full-traceback-to-error-notifications

Change-Id: Id587967ea4f9980c292492e2f659bf55fb037b28

This patch refactors the sample files of instance.create notifications.
As these notifications use a different payload class as the most of the
instance notifications a new common payload sample fragment was also
needed.

Change-Id: I7a8e9507ee30d404e075a46e48070a0f94276e33

This adds the description field to the FlavorPayload
for versioned notifications on flavor create/update/delete
notifications.

Part of blueprint flavor-description

Change-Id: I9a5dc8b603b5e4e0d37c59cf2749e3ffc217580c

Change-Id: Iddc5ec3b5053ddf5dce73c86edca26c4552d451b
Implements: bp versioned-notification-transformation-pike
Closes-Bug: #1684860

This patch added a new field 'tags' to InstanceCreatePayload.

Partial-implement: bp additional-notification-fields-for-searchlight
Partial-implement: blueprint support-tag-instance-when-boot

Change-Id: Iefaa9da4e136fd5e823bf7b11c8aa5b4cd6d7de8

This patch adds bdm related data to InstancePayload. As loading BDM
can be expensive a new configuration flag 'bdms_in_notifications' is
introduced. If this is set to false (as by default) then the instance
notifications will contain 'null' value in block_devices field.
If this configuration flag is set to true then the block devices will
be loaded from the db and will be included in the notification payload.

Implements: bp additional-notification-fields-for-searchlight
Change-Id: I18e7483ec9a484a660e1d306fdc0986e1d5f952b

Add key_name field to InstancePayload which means every instance.<action>
notification now have key_name field based on the instance.key_name.

Change-Id: I39059c5077c790aa85dff6b4563f581c54536b86
Implements: bp additional-notification-fields-for-searchlight

Add keypairs field to instance.create notifications based on
instance.keypairs field.

Change-Id: I30e068d4de4b45f34308665de37d4cb9d6502111
Implements: bp additional-notification-fields-for-searchlight

There are two parallel efforts to add new fields to the instance.create
notification only. Currently instance.create notification uses the generic
InstanceActionPayload ovo as the payload type. This patch creates a separate
InstanceCreatePayload ovo so that fields like keypairs and tags can be added
only to this specific payload class later in separate patches.

The keypair and tags field are not added directly to the base InstancePayload
class because both field need extra db query to fetch. So sending them at
every instance action (e.g. reboot) could cause db load.

The version of the instance.create payload is not bumped as the content
of the payload is the same just the name of the type is changed.

Change-Id: I90fb7beb450100de8f4e542921b99f043c529a0f

Add auto_disk_config field to InstancePayload based on
instance.auto_disk_config boolean value. If true, set it to
AUTO else MANUAL.

Implements: bp additional-notification-fields-for-searchlight
Change-Id: I18af99479562e2fe5e74e6e1252b804b074fee58