Fix guest agent failed to use swiftclient over TLS

This commit adds insecure=True parameter to swiftclient.

Story: #2010674
Task: #47748
Change-Id: I6156b289659dc9130effb1666c3cd2e14366bffe
(cherry picked from commit 895e59237e)

backup/storage/swift.py

@@ -43,7 +43,9 @@ def _get_service_client(auth_url, token, tenant_id, region_name=None):
         os_options = {
             'region_name': region_name
         }
-    return swiftclient.Connection(session=sess, os_options=os_options)
+    return swiftclient.Connection(session=sess,
+                                  os_options=os_options,
+                                  insecure=True)
 
 
 def _set_attr(original):

releasenotes/notes/fix-swift-connect-over-tls-c4e62213a8d38fe2.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fix a bug where swift client in the trove guest instance failed to verify
+    certification against the self-signed certificate authority.
+    `Story 2010674 <https://storyboard.openstack.org/#!/story/2010674>`__