6.15.z-fix subscription search box xpath (#1405)

* fix subscription search box xpath

* add sleep to test changes in CI

airgun/entities/subscription.py

@@ -176,6 +176,7 @@ def delete(self, entity_name):
     def read_subscriptions(self):
         """Return subscriptions table"""
         view = self.navigate_to(self, 'All')
+        view.wait_displayed(timeout=10, delay=1)
         return view.table.read()
 
     def sca_alert(self):

airgun/views/subscription.py

@@ -23,7 +23,9 @@
 # Search field and button on Subscriptions page uses different locators,
 # so subclass it and use it in our custom SearchableViewMixin
 class SubscriptionSearch(Search):
-    search_field = TextInput(locator=(".//input[starts-with(@id, 'downshift-')]"))
+    search_field = TextInput(
+        locator=('//input[@aria-label="Search input" and @placeholder="Search"]')
+    )
     search_button = Button('Search')