SwaggerDefaultValues doesn't set the default value for boolean properties correctly

[icnocop]

Hi.

.\samples\aspnetcore\SwaggerODataSample\SwaggerDefaultValues.cs assumes properties are strings and this causes some issues.

For example:

1. Run the samples\aspnetcore\SwaggerODataSample project
2. Select definition V3
3. Expand GET ​/api​/Acme​/Products
4. Click Try it out
5. Click Execute
6. Notice the $count parameter is required to be manually set to true or false.

[icnocop]

I found a solution to this problem here:
#429 (comment)

[commonsensesoftware]

I'm sure why this issue didn't auto-close, but I believe you PR fixes this issue. If I'm mistaken, please re-open. Thanks