cheets_CTS: change test name.

Try to avoid special symbols, as this string is used in less expected
places, even though it seems to work in practice.

BUG=None.
TEST=None.

Change-Id: I1933ae78aa291502dd1bcc317bf57365243389ec
Reviewed-on: https://chromium-review.googlesource.com/441252
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>
diff --git a/server/site_tests/cheets_CTS/cheets_CTS.py b/server/site_tests/cheets_CTS/cheets_CTS.py
index 851ec0b..754b961 100644
--- a/server/site_tests/cheets_CTS/cheets_CTS.py
+++ b/server/site_tests/cheets_CTS/cheets_CTS.py
@@ -358,7 +358,7 @@
                 test_class=target_class, test_method=target_method)
         else:
             test_command = self._tradefed_run_command()
-            test_name = '<all CTS tests>'
+            test_name = 'all_CTS'
 
         # Unconditionally run CTS package until we see some tests executed.
         while steps < self._max_retry and total_tests == 0: