V8 Buildbot: Switch ignition tests to v8-side test set.

scripts/slave/recipe_modules/v8/testing.py

Index: scripts/slave/recipe_modules/v8/testing.py
diff --git a/scripts/slave/recipe_modules/v8/testing.py b/scripts/slave/recipe_modules/v8/testing.py
index 6d126a1a36b76b01506ef5c1943a08e29ea0692f..498a1de1b68de8a272c34a29fd98ae5badc44fed 100644
--- a/scripts/slave/recipe_modules/v8/testing.py
+++ b/scripts/slave/recipe_modules/v8/testing.py
@@ -12,15 +12,15 @@ TEST_CONFIGS = freeze({
     'tests': ['benchmarks'],
     'test_args': ['--download-data'],
   },
+  'ignition': {
+    'name': 'Ignition',
+    'tests': ['ignition'],
+    'test_args': ['--variants=ignition', '--ignition'],
+  },
   'mjsunit': {
     'name': 'Mjsunit',
     'tests': ['mjsunit'],
   },
-  'mjsunit_ignition': {
-    'name': 'Mjsunit - ignition',
-    'tests': ['mjsunit'],
-    'test_args': ['--variants=ignition', '--ignition'],
-  },
   'mjsunit_sp_frame_access': {
     'name': 'Mjsunit - sp frame access',
     'tests': ['mjsunit'],