[AutoPR alertsmanagement/resource-manager] Changed the descriptions of multiple items to bring more clarity for users.

[AutorestCI]

Created to sync Azure/azure-rest-api-specs#4365

[AutorestCI]

(message created by the CI based on PR content)

Installation instruction

Package azure-mgmt-alertsmanagement

You can install the package azure-mgmt-alertsmanagement of this PR using the following command:
pip install "git+https://github.com/Azure/azure-sdk-for-python@restapi_auto_4365#egg=azure-mgmt-alertsmanagement&subdirectory=azure-mgmt-alertsmanagement"

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_4365#egg=azure-mgmt-alertsmanagement&subdirectory=azure-mgmt-alertsmanagement"

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

• git checkout restapi_auto_4365
• pip install -e ./azure-mgmt-alertsmanagement

Or build a wheel file to distribute for testing:

• git checkout restapi_auto_4365
• pip wheel --no-deps ./azure-mgmt-alertsmanagement

Direct download

Your files can be directly downloaded here:

• azure_mgmt_alertsmanagement-2018_05_05-py2.py3-none-any.whl
• azure-mgmt-alertsmanagement-2018-05-05.zip

[AutorestCI]

This PR has been merged into #3723