[Python] Fix bug of test files about packageName

modules/swagger-codegen/src/main/resources/python/api_test.mustache

@@ -8,16 +8,16 @@ import os
 import sys
 import unittest
 
-import swagger_client
-from swagger_client.rest import ApiException
-from swagger_client.apis.{{classVarName}} import {{classname}}
+import {{packageName}}
+from {{packageName}}.rest import ApiException
+from {{packageName}}.apis.{{classVarName}} import {{classname}}
 
 
 class {{#operations}}Test{{classname}}(unittest.TestCase):
     """ {{classname}} unit test stubs """
 
     def setUp(self):
-        self.api = swagger_client.apis.{{classVarName}}.{{classname}}()
+        self.api = {{packageName}}.apis.{{classVarName}}.{{classname}}()
 
     def tearDown(self):
         pass

modules/swagger-codegen/src/main/resources/python/model_test.mustache

@@ -10,9 +10,9 @@ import unittest
 
 {{#models}}
 {{#model}}
-import swagger_client
-from swagger_client.rest import ApiException
-from swagger_client.models.{{classFilename}} import {{classname}}
+import {{packageName}}
+from {{packageName}}.rest import ApiException
+from {{packageName}}.models.{{classFilename}} import {{classname}}
 
 
 class Test{{classname}}(unittest.TestCase):
@@ -28,7 +28,7 @@ class Test{{classname}}(unittest.TestCase):
         """
         Test {{classname}}
         """
-        model = swagger_client.models.{{classFilename}}.{{classname}}()
+        model = {{packageName}}.models.{{classFilename}}.{{classname}}()
 
 {{/model}}
 {{/models}}