Consider alternate license rather than GNUv3 sql-alwayson-md-ilb-zones

@robotechredmond
[sql-alwayson-md-ilb-zones](https://github.com/Azure/azure-quickstart-templates/tree/master/demos/sql-alwayson-md-ilb-zones)

### Issue Details

The current GPLv3 license means that private companies can't take this demo template and adapt it to their internal needs without releasing the code, which would give indications of the internal environment modifications and compromising security. Consider a more permissive license like LGPL or MIT.

Start with the sql-alwayson-md-ilb-zones demo linked in the issue and review how its current GNUv3 license is represented. Determine whether the maintainers can approve an alternative license and which license they choose; the work is complete only after that decision and the associated licensing updates are confirmed.

Written by the indexing model from the issue text.