Log Analytics workspace with solutions and data sources - solutions array is not working

[Log Analytics workspace with solutions and data sources](https://github.com/Azure/azure-quickstart-templates/tree/master/quickstarts/microsoft.logic/logic-app-create)

### Issue Details
The template has an array parameter for the solutions, but AzureRM seems to be unable to extract the properties (name, product, publisher etc) from just the solution name. I can't see how this is supposed to work with just an array.

The error from AzureRM is as follows:
`{"code": "InvalidTemplate", "target": "/subscriptions/redacted/resourceGroups/redacted/providers/Microsoft.Resources/deployments/loganalytics", "message": "Deployment template validation failed: 'The template resource '[format('{0}({1})', parameters('solutions')[copyIndex()].name, parameters('name'))]' at line '1' and column '2975' is not valid: The language expression property 'name' can't be evaluated.. Please see https://aka.ms/arm-template-expressions for usage details.'.", "additionalInfo": [{"type": "TemplateViolation", "info": {"lineNumber": 1, "linePosition": 2975, "path": "properties.template.resources[1]"}}]}`

### Repro steps
1. Deploy the template with any kind of oms solution name specified in the array

Inspect the linked quickstart at quickstarts/microsoft.logic/logic-app-create, focusing on the solutions parameter and the Log Analytics deployment resource. Reproduce the deployment with an OMS solution name and trace the reported solutions[copyIndex()].name evaluation error. Done means the template deploys successfully when a solution name is supplied in the array.

Written by the indexing model from the issue text.