Fix model_optimizer_options

Author: dmitriy-serdyuk

cortex/_lib/optimizer.py

@@ -170,7 +170,8 @@ def setup(model, optimizer='Adam', learning_rate=1.e-4,
         optimizer_options_.update(weight_decay=wd, clipping=cl, lr=eta)
 
         if network_key in model_optimizer_options.keys():
-            optimizer_options_.update(**model_optimizer_options)
+            optimizer_options_.update(
+                **eval(model_optimizer_options[network_key]))
 
         # Create the optimizer
         op = wrap_optimizer(op)