Show share network details to non-admin

Horizon attempts to show associated share servers when displaying
share network details in the project share-networks dashboard.  But
unless the horizon user is an admin this generates a 403 exception
which in turn causes Horizon to pop-up an error message about being
unable to retrieve share network details.

So instead catch exceptions collecting share server information in
this context and continue on gracefully, presenting the share server
details that are available.

Change-Id: I822ba95dc8e41df2775f908c287565f5da6a7e9d
Closes-Bug: #1702396

manila_ui/dashboards/project/share_networks/views.py

@@ -136,10 +136,15 @@ class Detail(tabs.TabView):
             for ss in share_net.sec_services:
                 ss.type = utils.get_nice_security_service_type(ss)
             server_search_opts = {'share_network_id': share_net_id}
-            share_servs = manila.share_server_list(
-                self.request,
-                search_opts=server_search_opts)
-            share_net.share_servers = share_servs
+            try:
+                share_servs = manila.share_server_list(
+                    self.request,
+                    search_opts=server_search_opts)
+            #  Non admins won't be able to get share servers
+            except Exception:
+                share_servs = []
+            if share_servs:
+                share_net.share_servers = share_servs
         except Exception:
             exceptions.handle(self.request,
                               _('Unable to retrieve share network details.'),

releasenotes/notes/bug-1702396-fix-cannot-get-share-network-details-83e2882df1714506.yaml

@@ -0,0 +1,9 @@
+---
+fixes:
+  - |
+    Fixed an issue where an error message popped up about not being able to
+    retrieve share network details when an ordinary user attempted to see these
+    because the user wasn't authorized for certain admin-only ``share server``
+    information.  In this circumstance we now handle this situation gracefully
+    behind the scenes and display all the share network information for which
+    the end user is authorized.