Raise exception when error_deleting

Tempest checks a volume delete by waiting for NotFound(404) on
show_volume(). Sometime a volume delete fails and the volume status
becomes error_deleting which means the delete is failed.
So Tempest doesn't need to wait anymore. This patch makes the check
raise an exception instead of waiting.

Closes-Bug: #1686429

Change-Id: I17a986be2eb05ef9b177d5248de02a3336f7d4bb
diff --git a/releasenotes/notes/raise-exception-when-error-deleting-on-volume-18d0d0c5886212dd.yaml b/releasenotes/notes/raise-exception-when-error-deleting-on-volume-18d0d0c5886212dd.yaml
new file mode 100644
index 0000000..194dbc1
--- /dev/null
+++ b/releasenotes/notes/raise-exception-when-error-deleting-on-volume-18d0d0c5886212dd.yaml
@@ -0,0 +1,8 @@
+---
+upgrade:
+  - |
+    Tempest checks a volume delete by waiting for NotFound(404) on
+    show_volume(). Sometime a volume delete fails and the volume status
+    becomes error_deleting which means the delete is failed.
+    So Tempest doesn't need to wait anymore. A new release of Tempest
+    raises an exception DeleteErrorException instead of waiting.