move import combinator suggestions into a separate computer

pkg/analysis_server/test/services/completion/test_all.dart

Index: pkg/analysis_server/test/services/completion/test_all.dart
diff --git a/pkg/analysis_server/test/services/completion/test_all.dart b/pkg/analysis_server/test/services/completion/test_all.dart
index 1aeba0da1d550d206258e51ad63d4420b1e22867..7efd76adc410c115d4146d38c31d7f16cadb4821 100644
--- a/pkg/analysis_server/test/services/completion/test_all.dart
+++ b/pkg/analysis_server/test/services/completion/test_all.dart
@@ -6,6 +6,7 @@ library test.services.completion;
 
 import 'package:unittest/unittest.dart';
 
+import 'combinator_computer_test.dart' as combinator_test;
 import 'completion_computer_test.dart' as completion_computer_test;
 import 'completion_manager_test.dart' as completion_manager_test;
 import 'imported_computer_test.dart' as imported_test;
@@ -17,6 +18,7 @@ import 'local_computer_test.dart' as local_test;
 main() {
   groupSep = ' | ';
   group('completion', () {
+    combinator_test.main();
     completion_computer_test.main();
     completion_manager_test.main();
     imported_test.main();