TF-3691 Add integration test for case search snippets with html escape

Signed-off-by: dab246 <tdvu@linagora.com>

integration_test/tests/search/search_snippets_with_html_escape_test.dart

@@ -0,0 +1,9 @@
+import '../../base/test_base.dart';
+import '../../scenarios/search/search_snippets_with_html_escape_scenario.dart';
+
+void main() {
+  TestBase().runPatrolTest(
+    description: 'Should see email with subject escaped when search email successfully',
+    scenarioBuilder: ($) => SearchSnippetsWithHtmlEscapeScenario($),
+  );
+}