ISAICP-4618: Provide a test for the tallinn report date.

tests/features/communities/tallinn/last_update.feature

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+@api @tallinn
+Feature:
+  As a moderator of Joinup
+  I want to be able to be aware when was the last update time of a tallinn report.
+
+  Background:
+    Given users:
+      | Username | Roles     |
+      | karma    | moderator |
+
+  Scenario: Tallinn reports that have never been updated should not show last update date.
+    # Timestamp 1530529671 translates to 02-07-2018.
+    Given tallinn_report content:
+      | title          | collection                      | created    | changed    |
+      | Romania Report | Tallinn Ministerial Declaration | 1530529671 | 1530529671 |
+    When I am logged in as "karma"
+    And I go to the "Tallinn Ministerial Declaration" collection
+    And I click "Tallinn initiative" in the "Left sidebar" region
+    Then I should see the text "Last update: -" in the "Romania Report" tile
+    And I should not see the text "02/07/2018" in the "Romania Report" tile
+
+  Scenario: Tallinn reports that have been updated should show last update date.
+    # Timestamp 1530443270 translates to 01-07-2018, timestamp 1530529671 translates to 02-07-2018.
+    Given tallinn_report content:
+      | title          | collection                      | created    | changed    |
+      | Romania Report | Tallinn Ministerial Declaration | 1530443270 | 1530529671 |
+    When I am logged in as "karma"
+    And I go to the "Tallinn Ministerial Declaration" collection
+    And I click "Tallinn initiative" in the "Left sidebar" region
+    Then I should see the text "Last update: 02/07/2018" in the "Romania Report" tile