Support for tags read from file - create change set

Using AWS cli you have the option to create a change-set and specify tags from json-file.

This makes it possible to version control tags and have them committed in repository along with the other parameters.

In the current create-change-set tool you can choose to have the parameters inline or read from local file.
This option should also be available for Tags.

The issue names no files or tests. Start by locating the current create-change-set tool and its existing inline/local-file parameter handling, then compare the tag input with AWS CLI JSON-file behavior; done means tags can be read from a local file when creating a change set.

Written by the indexing model from the issue text.