fix dist_ctr getenv, test=develop

python/paddle/fluid/tests/unittests/dist_ctr.py

@@ -99,10 +99,10 @@ class TestDistCTR2x2(TestDistRunnerBase):
         inference_program = paddle.fluid.default_main_program().clone()
 
         regularization = None
-        use_l2_decay = bool(os.getenv(['USE_L2_DECAY'], 0))
+        use_l2_decay = bool(os.getenv('USE_L2_DECAY', 0))
         if use_l2_decay:
             regularization = fluid.regularizer.L2DecayRegularizer(
-                regularization_coeff=1e-3)
+                regularization_coeff=1e-1)
 
         sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.0001,
                                             regularization=regularization)