set persistable for fetched variables temporarily to pass CE, test=develop

fluid/PaddleCV/gan/cycle_gan/trainer.py

@@ -13,6 +13,8 @@ class GATrainer():
         self.program = fluid.default_main_program().clone()
         with fluid.program_guard(self.program):
             self.fake_B = build_generator_resnet_9blocks(input_A, name="g_A")
+            #FIXME set persistable explicitly to pass CE
+            self.fake_B.persistable = True
             self.fake_A = build_generator_resnet_9blocks(input_B, name="g_B")
             self.cyc_A = build_generator_resnet_9blocks(self.fake_B, "g_B")
             self.cyc_B = build_generator_resnet_9blocks(self.fake_A, "g_A")
@@ -58,6 +60,8 @@ class GBTrainer():
         with fluid.program_guard(self.program):
             self.fake_B = build_generator_resnet_9blocks(input_A, name="g_A")
             self.fake_A = build_generator_resnet_9blocks(input_B, name="g_B")
+            #FIXME set persistable explicitly to pass CE
+            self.fake_A.persistable = True
             self.cyc_A = build_generator_resnet_9blocks(self.fake_B, "g_B")
             self.cyc_B = build_generator_resnet_9blocks(self.fake_A, "g_A")
             self.infer_program = self.program.clone()