AU: Change test http server port from 8080 to 8088.

This allows developers to run unit tests while the dev server is running. Also
remove obsole test_http_server.py.

BUG=8889
TEST=unit tests while dev server is running.

Change-Id: Iaf0ff92edbb959d93bd206c0007455f637682e2c

Review URL: http://codereview.chromium.org/4667002
diff --git a/http_fetcher_unittest.cc b/http_fetcher_unittest.cc
index 6c420a0..30cde95 100644
--- a/http_fetcher_unittest.cc
+++ b/http_fetcher_unittest.cc
@@ -24,8 +24,8 @@
 namespace chromeos_update_engine {
 
 namespace {
-// WARNING, if you update these, you must also update test_http_server.py
-const char* const kServerPort = "8080";
+// WARNING, if you update these, you must also update test_http_server.cc.
+const char* const kServerPort = "8088";
 const int kBigSize = 100000;
 string LocalServerUrlForPath(const string& path) {
   return string("http://127.0.0.1:") + kServerPort + path;