s/share_net/share_network in scenario tests

A typo was broking scenario tests, this patch set
changes share_net['id'] for share_network['id'] to
fix this.

Closes-Bug: #1783194
TrivialFix

Change-Id: I587708b91b6261341ee017fbee345f57a99e7f48
diff --git a/manila_tempest_tests/tests/scenario/manager_share.py b/manila_tempest_tests/tests/scenario/manager_share.py
index 556123f..a80400e 100644
--- a/manila_tempest_tests/tests/scenario/manager_share.py
+++ b/manila_tempest_tests/tests/scenario/manager_share.py
@@ -202,7 +202,7 @@
             default_share_type_id = self._get_share_type()['id']
             kwargs.update({'share_type_id': default_share_type_id})
         if CONF.share.multitenancy_enabled:
-            kwargs.update({'share_network_id': self.share_net['id']})
+            kwargs.update({'share_network_id': self.share_network['id']})
         self.share = self._create_share(**kwargs)
         return self.share