os_volumes: Support upper constraints

Author: markgoddard

roles/os_volumes/README.md

@@ -41,6 +41,9 @@ dict containing the following items:
 - `extra_specs`: Optional dict of additional specifications for the volume
   type.
 
+`os_volumes_upper_constraints_file` is a file or URL containing Python upper
+constraints.
+
 Dependencies
 ------------
 

roles/os_volumes/defaults/main.yml

@@ -32,3 +32,6 @@ os_volumes: [] # noqa: var-naming[no-role-prefix]
 # - 'extra_specs': Optional dict of additional specifications for the volume
 #   type.
 os_volumes_types: []
+
+# A file or URL containing Python upper constraints.
+os_volumes_upper_constraints_file:

roles/os_volumes/meta/main.yml

@@ -2,5 +2,7 @@
 dependencies:
   - role: stackhpc.openstack.os_openstacksdk
     os_openstacksdk_venv: "{{ os_volumes_venv }}"
+    os_openstacksdk_upper_constraints_file: "{{ os_volumes_upper_constraints_file }}"
   - role: stackhpc.openstack.os_openstackclient
     os_openstackclient_venv: "{{ os_volumes_venv }}"
+    os_openstackclient_upper_constraints_file: "{{ os_volumes_upper_constraints_file }}"