Disable log uploading when running integration tests locally

Previously when running the tests locally log uploading is enabled, which not only slowed down the tests but also do a lot of disk writes for unpacking the uplaoder binary.

Test: run any integration tests
Change-Id: I523697abc6c8818c95490434dd206b2301bb7290
diff --git a/atest/integration_tests/atest_integration_test.py b/atest/integration_tests/atest_integration_test.py
index c38273f..c8416d6 100644
--- a/atest/integration_tests/atest_integration_test.py
+++ b/atest/integration_tests/atest_integration_test.py
@@ -434,6 +434,9 @@
             print(output, end='', file=print_dst)
           capture_dst.append(output)
 
+    # Disable log uploading when running locally.
+    env['ENABLE_ATEST_LOG_UPLOADING'] = 'false'
+
     def run_popen(stdin=None):
       with subprocess.Popen(
           cmd,