101-servicebus-topic-subscription-sqlfilter creates a filter with an expression of '1=1'

101-servicebus-topic-subscription-sqlfilter

### Issue Details
The subscription is created successfully, but the filter expression is "1=1".
I used the ServiceBusExplorer to confirm.
The filter expression I declare is: "user.MessageType = 'mytype'" (without double-quotes)

Start with the 101-servicebus-topic-subscription-sqlfilter template and inspect how the subscription filter expression is declared. Validate the deployment using the declared user.MessageType = 'mytype' expression, then confirm in ServiceBusExplorer that the deployed filter is no longer 1=1.

Written by the indexing model from the issue text.