prepare for master to main rename. commit this PR after the rename has finished (Azure#19331)

Author: scbedd

scripts/auto_release/main.py

@@ -417,4 +417,4 @@ def main():
         my_print(e)
     else:
         with open(f'{OUT_PATH}/output.txt', 'w') as file_out:
-            file_out.writelines([f'{NEW_BRANCH}\n', "master" if TRACK == '2' else 'release/v3'])
+            file_out.writelines([f'{NEW_BRANCH}\n', "main" if TRACK == '2' else 'release/v3'])

scripts/devops_tasks/test_regression.py

@@ -35,7 +35,7 @@
 test_tools_req_file = os.path.abspath(os.path.join(root_dir, "eng", "test_tools.txt"))
 
 GIT_REPO_NAME = "azure-sdk-for-python"
-GIT_MASTER_BRANCH = "master"
+GIT_MASTER_BRANCH = "main"
 VENV_NAME = "regressionenv"
 AZURE_SDK_FOR_PYTHON_GIT_URL = "https://github.com/Azure/azure-sdk-for-python.git"
 TEMP_FOLDER_NAME = ".tmp_code_path"

sdk/containerregistry/azure-mgmt-containerregistry/tests/disable_test_mgmt_containerregistry_2018_02_01_preview.py

@@ -276,7 +276,7 @@ def _create_build_task(self, build_task_name, registry_name, resource_group_name
 
     def _create_build_step(self, build_step_name, build_task_name, registry_name, resource_group_name, location):
         docker_build_step = DockerBuildStep(
-            branch='master',
+            branch='main',
             image_names=['repo:tag'],
             is_push_enabled=True,
             no_cache=False,
@@ -294,7 +294,7 @@ def _create_build_step(self, build_step_name, build_task_name, registry_name, re
         ).result()
 
         self.assertEqual(build_step.name, build_step_name)
-        self.assertEqual(build_step.properties.branch, 'master')
+        self.assertEqual(build_step.properties.branch, 'main')
         self.assertEqual(build_step.properties.image_names, ['repo:tag'])
         self.assertEqual(build_step.properties.is_push_enabled, True)
         self.assertEqual(build_step.properties.no_cache, False)