Refactoring: Make gtest testsuite the default.

tools/testrunner/local/testsuite.py

Index: tools/testrunner/local/testsuite.py
diff --git a/tools/testrunner/local/testsuite.py b/tools/testrunner/local/testsuite.py
index 0fd3f3a3000a35ac2c06549b36e7c4cecd907e80..77d2e0d9890f248d3faf22241edbf07f0869603b 100644
--- a/tools/testrunner/local/testsuite.py
+++ b/tools/testrunner/local/testsuite.py
@@ -35,17 +35,19 @@ from . import utils
 class TestSuite(object):
 
   @staticmethod
-  def LoadTestSuite(root):
+  def LoadTestSuite(root, default):
     name = root.split(os.path.sep)[-1]
     f = None
     try:
       (f, pathname, description) = imp.find_module("testcfg", [root])
       module = imp.load_module("testcfg", f, pathname, description)
-      suite = module.GetSuite(name, root)
+      return module.GetSuite(name, root)
+    except:
+      # Use default if no testcfg is present.
+      return default(name, root)
     finally:
       if f:
         f.close()
-    return suite
 
   def __init__(self, name, root):
     self.name = name  # string