Trove workbook for scheduled backups

A Mistral workbook adding a workflow for creating a backup.
This is used by the "trove schedule-create" command to schedule
a backup.

Change-Id: I68d997abf4ec7c32044dd18cf2a70e687c0fed9f
Implements: blueprint schedule-backups

etc/trove/trove-workbook.yaml

@@ -0,0 +1,19 @@
+---
+version: '2.0'
+
+name: trove
+
+description: Trove Workflows
+
+workflows:
+
+  backup_create:
+    input: [instance, name, description, incremental]
+    output:
+      status: <% $.message %>
+
+    tasks:
+      backup_create:
+        action: trove.backups_create instance=<% $.instance %> name=<% $.name %> description=<% $.description %> incremental=<% $.incremental %>
+        publish:
+          message: <% 'Backup complete' %>