Rename "install" -> "get" and "update" -> "upgrade".

sdk/lib/_internal/pub/test/install/hosted/install_test.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library pub_tests;
-
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration('installs a package from a pub server', () {
-    servePackages([packageMap("foo", "1.2.3")]);
-
-    d.appDir({"foo": "1.2.3"}).create();
-
-    pubInstall();
-
-    d.cacheDir({"foo": "1.2.3"}).validate();
-    d.packagesDir({"foo": "1.2.3"}).validate();
-  });
-
-  integration('URL encodes the package name', () {
-    servePackages([]);
-
-    d.appDir({"bad name!": "1.2.3"}).create();
-
-    pubInstall(error: new RegExp(
-        r'Could not find package "bad name!" at http://127\.0\.0\.1:\d+\.$'));
-  });
-}