update affected UT

Author: ppapapetrou76

server/server_test.go

@@ -1446,9 +1446,9 @@ func TestCacheControlHeaders(t *testing.T) {
 		{
 			name:                        "main js bundle does not exists",
 			filename:                    "main.e4188e5adc97bbfc00c0.js",
-			createFile:                  false,
+			createFile:                  false,..
 			expectedStatus:              404,
-			expectedCacheControlHeaders: []string{"no-cache"},
+			expectedCacheControlHeaders: nil,
 		},
 	}