hacking: Fix check for missing ignore_missing calls

Change-Id: I54f7bf2026507b357fdf921993c69913e7c32db2
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

Author: stephenfin

hacking/checks.py

@@ -154,6 +154,11 @@ def visit_Call(self, node):
                 isinstance(node.func.value, ast.Name)
                 and node.func.value.id.endswith('client')
             )
+            or (
+                # handle calls like 'self.compute_client.find_server'
+                isinstance(node.func.value, ast.Attribute)
+                and node.func.value.attr.endswith('_client')
+            )
             or (
                 # handle calls like 'self.app.client_manager.image.find_image'
                 isinstance(node.func.value, ast.Attribute)