[autotest] Support test to upload results to Sponge inside test code.

This allows android_ACTS test to upload results to Sponge including the child
test results in test_run_summary.json file.
The test only needs to make following call at the end of the test:
url = sponge_utils.upload_results_in_test(self, acts_summary='path_to_json')

BUG=chromium:616211
TEST=python site_utils/sponge_utils_functional_test.py

Change-Id: Ida93ffc802a9b9e3eb9d8217b0d7af69ab31f48b
Reviewed-on: https://chromium-review.googlesource.com/356167
Commit-Ready: Dan Shi <[email protected]>
Tested-by: Dan Shi <[email protected]>
Reviewed-by: Ang Li <[email protected]>
Reviewed-by: Dan Shi <[email protected]>
diff --git a/utils/unittest_suite.py b/utils/unittest_suite.py
index bfbe1f4..7cc9d98 100755
--- a/utils/unittest_suite.py
+++ b/utils/unittest_suite.py
@@ -108,6 +108,8 @@
     'des_02_test.py',
     # Rquire lxc to be installed
     'lxc_functional_test.py',
+    # Require sponge utils installed in site-packages
+    'sponge_utils_functional_test.py',
     ))
 
 LONG_TESTS = (REQUIRES_MYSQLDB |