tests: use done() when closing express servers (#8840)

Author: alxndrsn

tests/component/test.deletion_error.js

@@ -29,8 +29,8 @@ describe('test.deletion_error.js', function () {
     server = app.listen(0);
   });
 
-  after(function () {
-    return server.close();
+  after(function (done) {
+    server.close(done);
   });
 
   it('Test error during deletion', function () {

tests/component/test.read_only_replication.js

@@ -38,8 +38,8 @@ describe('test.read_only_replication.js', function () {
     server = app.listen(0);
   });
 
-  after(function () {
-    return server.close();
+  after(function (done) {
+    server.close(done);
   });
 
   it('Test checkpointer handles error codes', function () {

tests/component/test.replication_perf_regression.js

@@ -34,8 +34,8 @@ describe('test.replication_perf_regression.js', function () {
     };
   });
 
-  after(function () {
-    return server.close();
+  after(function (done) {
+    server.close(done);
   });
 
   it('#5199 fix excessively long replication loop', function () {