more flexible test naming in reports
diff --git a/tools/run_tests/report_utils.py b/tools/run_tests/report_utils.py
index 35dcaca..4fe9cf8 100644
--- a/tools/run_tests/report_utils.py
+++ b/tools/run_tests/report_utils.py
@@ -55,11 +55,12 @@
     return msg
 
 
-def render_junit_xml_report(resultset, xml_report):
+def render_junit_xml_report(resultset, xml_report, suite_package='grpc',
+                            suite_name='tests'):
   """Generate JUnit-like XML report."""
   root = ET.Element('testsuites')
-  testsuite = ET.SubElement(root, 'testsuite', id='1', package='grpc', 
-                            name='tests')
+  testsuite = ET.SubElement(root, 'testsuite', id='1', package=suite_package,
+                            name=suite_name)
   for shortname, results in resultset.iteritems(): 
     for result in results:
       xml_test = ET.SubElement(testsuite, 'testcase', name=shortname) 
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index c7d10e0..c286d4d 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -949,6 +949,8 @@
 argp.add_argument('-a', '--antagonists', default=0, type=int)
 argp.add_argument('-x', '--xml_report', default=None, type=str,
         help='Generates a JUnit-compatible XML report')
+argp.add_argument('--report_suite_name', default='tests', type=str,
+        help='Test suite name to use in generated JUnit XML report')
 argp.add_argument('--force_default_poller', default=False, action='store_const', const=True,
                   help='Dont try to iterate over many polling strategies when they exist')
 args = argp.parse_args()
@@ -1273,7 +1275,8 @@
 
   if build_only:
     if xml_report:
-      report_utils.render_junit_xml_report(resultset, xml_report)
+      report_utils.render_junit_xml_report(resultset, xml_report,
+                                           suite_name=args.report_suite_name)
     return []
 
   # start antagonists
@@ -1325,7 +1328,8 @@
     for antagonist in antagonists:
       antagonist.kill()
     if xml_report and resultset:
-      report_utils.render_junit_xml_report(resultset, xml_report)
+      report_utils.render_junit_xml_report(resultset, xml_report,
+                                           suite_name=args.report_suite_name)
 
   number_failures, _ = jobset.run(
       post_tests_steps, maxjobs=1, stop_on_failure=True,
diff --git a/tools/run_tests/run_tests_matrix.py b/tools/run_tests/run_tests_matrix.py
index a94f9cf..60c21a1 100755
--- a/tools/run_tests/run_tests_matrix.py
+++ b/tools/run_tests/run_tests_matrix.py
@@ -55,7 +55,8 @@
                    '--use_docker',
                    '-t',
                    '-j', str(_INNER_JOBS),
-                   '-x', 'report_%s.xml' % name] + runtests_args,
+                   '-x', 'report_%s.xml' % name,
+                   '--report_suite_name', '%s' % name] + runtests_args,
           shortname='run_tests_%s' % name,
           timeout_seconds=_RUNTESTS_TIMEOUT)
   return test_job
@@ -70,7 +71,8 @@
           cmdline=['tools/run_tests/run_tests_in_workspace.sh',
                    '-t',
                    '-j', str(_INNER_JOBS),
-                   '-x', '../report_%s.xml' % name] + runtests_args,
+                   '-x', '../report_%s.xml' % name,
+                   '--report_suite_name', '%s' % name] + runtests_args,
           environ=env,
           shortname='run_tests_%s' % name,
           timeout_seconds=_RUNTESTS_TIMEOUT)
@@ -271,7 +273,8 @@
                                      newline_on_success=True,
                                      travis=True,
                                      maxjobs=args.jobs)
-report_utils.render_junit_xml_report(resultset, 'report.xml')
+report_utils.render_junit_xml_report(resultset, 'report.xml',
+                                     suite_name='aggregate_tests')
 
 if num_failures == 0:
   jobset.message('SUCCESS', 'All run_tests.py instance finished successfully.',