Change TestResultServer to use python 2.7.

Tools/TestResultServer/model/jsonresults.py

Index: Tools/TestResultServer/model/jsonresults.py
diff --git a/Tools/TestResultServer/model/jsonresults.py b/Tools/TestResultServer/model/jsonresults.py
index 16316f3a17e014ca91d80825fb9fd1309d4009b9..9da9d3251e5e4e92bf3ee04d75950677d44a6acc 100755
--- a/Tools/TestResultServer/model/jsonresults.py
+++ b/Tools/TestResultServer/model/jsonresults.py
@@ -26,8 +26,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-from datetime import datetime
-from django.utils import simplejson
+import json
 import logging
 import sys
 import traceback
@@ -107,8 +106,8 @@ class JsonResults(object):
         return data
 
     @classmethod
-    def _generate_file_data(cls, json, sort_keys=False):
-        return simplejson.dumps(json, separators=(',', ':'), sort_keys=sort_keys)
+    def _generate_file_data(cls, data, sort_keys=False):
+        return json.dumps(data, separators=(',', ':'), sort_keys=sort_keys)
 
     @classmethod
     def _load_json(cls, file_data):
@@ -118,7 +117,7 @@ class JsonResults(object):
             return None
 
         try:
-            return simplejson.loads(json_results_str)
+            return json.loads(json_results_str)
         except:
             logging.debug(json_results_str)
             logging.error("Failed to load json results: %s", traceback.print_exception(*sys.exc_info()))