[AutoPR managednetwork/resource-manager] Updated readme files for managed network

[AutorestCI]

Created to sync Azure/azure-rest-api-specs#7384

[AutorestCI]

(message created by the CI based on PR content)

Installation instruction

Package azure-mgmt-managednetwork

You can install the package azure-mgmt-managednetwork of this PR using the following command:
pip install "git+https://github.com/Azure/azure-sdk-for-python@restapi_auto_azure-cli-managed-network#egg=azure-mgmt-managednetwork&subdirectory=azure-mgmt-managednetwork"

You can build a wheel to distribute for test using the following command:
pip wheel --no-deps "git+https://github.com/Azure/azure-sdk-for-python@restapi_auto_azure-cli-managed-network#egg=azure-mgmt-managednetwork&subdirectory=azure-mgmt-managednetwork"

If you have a local clone of this repository, you can also do:

• git checkout restapi_auto_azure-cli-managed-network
• pip install -e ./azure-mgmt-managednetwork

Or build a wheel file to distribute for testing:

• git checkout restapi_auto_azure-cli-managed-network
• pip wheel --no-deps ./azure-mgmt-managednetwork

Direct download

Your files can be directly downloaded here:

• azure_mgmt_managednetwork-2019_06_01_preview-py2.py3-none-any.whl
• azure-mgmt-managednetwork-2019-06-01-preview.zip