Add tests for "new" Transfers API (mv 3.55)

Add a client and test class for Block Storage API v3.55

Change-Id: I4179799bc40a50bdbeecaee461d32e827269cc1f
diff --git a/releasenotes/notes/add-volume-transfers-v3.55-73f75073ad2c4091.yaml b/releasenotes/notes/add-volume-transfers-v3.55-73f75073ad2c4091.yaml
new file mode 100644
index 0000000..c35dd67
--- /dev/null
+++ b/releasenotes/notes/add-volume-transfers-v3.55-73f75073ad2c4091.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Add a ``TransfersV355Client`` to the volume v3 ``transfer_client`` library
+    supporting create, list, show, delete, and accept operations for the `new
+    Volume Transfers API
+    <https://docs.openstack.org/api-ref/block-storage/v3/#volume-transfers-volume-transfers-3-55-or-later>`_
+    of the Block Storage API v3.  The min_microversion of this API is 3.55.