Change _get_controller_config to _get_merged_config, so it applies to all multi-context configs

Bug: None
Test: local acts tests and unit tests
Change-Id: I8073b2335d0ef24f8582b5deac92e0591c23f81a
diff --git a/acts/framework/tests/test_utils/instrumentation/instrumentation_base_test_test.py b/acts/framework/tests/test_utils/instrumentation/instrumentation_base_test_test.py
index 04ac8e8..0a3ddde 100755
--- a/acts/framework/tests/test_utils/instrumentation/instrumentation_base_test_test.py
+++ b/acts/framework/tests/test_utils/instrumentation/instrumentation_base_test_test.py
@@ -29,11 +29,13 @@
         'lvl2': {'file1': 'FILE'}
     },
     'MockController': {
-        'param1': 1
+        'param1': 1,
+        'param2': 4
     },
     'MockInstrumentationBaseTest': {
         'MockController': {
-            'param2': 2
+            'param2': 2,
+            'param3': 5
         },
         'test_case': {
             'MockController': {
@@ -83,21 +85,21 @@
         controller config for the current test case.
         """
         self.instrumentation_test.current_test_name = 'test_case'
-        config = self.instrumentation_test._get_controller_config(
+        config = self.instrumentation_test._get_merged_config(
             'MockController')
-        self.assertNotIn('param1', config)
-        self.assertNotIn('param2', config)
-        self.assertIn('param3', config)
+        self.assertEqual(config.get('param1'), 1)
+        self.assertEqual(config.get('param2'), 2)
+        self.assertEqual(config.get('param3'), 3)
 
     def test_get_controller_config_for_test_class(self):
         """Test that _get_controller_config returns the controller config for
         the current test class (while no test case is running).
         """
-        config = self.instrumentation_test._get_controller_config(
+        config = self.instrumentation_test._get_merged_config(
             'MockController')
-        self.assertIn('param1', config)
-        self.assertIn('param2', config)
-        self.assertNotIn('param3', config)
+        self.assertEqual(config.get('param1'), 1)
+        self.assertEqual(config.get('param2'), 2)
+        self.assertEqual(config.get('param3'), 5)
 
 
 if __name__ == '__main__':