Fix export location used for extend/shrink tests

Instead of using the first export location, use the first export
location matching the address family (IPv4 or IPv6) to be used
for the mount.

Closes-Bug: #1848278
Change-Id: Ia2a0fefc34085e21e521acb7ccfdeecef7fda186
diff --git a/releasenotes/notes/bug-1848278-a37290750e6ac248.yaml b/releasenotes/notes/bug-1848278-a37290750e6ac248.yaml
new file mode 100644
index 0000000..f0ce109
--- /dev/null
+++ b/releasenotes/notes/bug-1848278-a37290750e6ac248.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Instead of using the first export location, use the first export location
+    matching the address family (IPv4 or IPv6) matching that to be used for the
+    mount.