Fix export location sent to manage share operation

Updates the share manage tests to provide the export location path
in the `export_path` share manage argument instead of sending a
dict with all information regarding specific export location.

Change-Id: I826d7dca38387cefe5e3ad1f6c0a47bbd3d31a5f
diff --git a/manila_tempest_tests/tests/api/admin/test_share_manage.py b/manila_tempest_tests/tests/api/admin/test_share_manage.py
index 5cda130..09bbdb7 100644
--- a/manila_tempest_tests/tests/api/admin/test_share_manage.py
+++ b/manila_tempest_tests/tests/api/admin/test_share_manage.py
@@ -85,10 +85,14 @@
             share_ids = [si['share_id'] for si in share_instance_list]
             self.assertNotIn(share['id'], share_ids)
 
+        export_path = share['export_locations'][0]
+        if utils.is_microversion_ge(version, "2.8"):
+            export_path = share['export_locations'][0]['path']
+
         # Manage share
         manage_params = {
             'service_host': share['host'],
-            'export_path': share['export_locations'][0],
+            'export_path': export_path,
             'protocol': share['share_proto'],
             'share_type_id': self.st['share_type']['id'],
             'name': name,