Less warnings when generating for mixed model and non model files.

[zeisler]

Sample output

Generating Mocks |========================================================>>| 100%
Error Summary
errors: 1, warn: 5, info: 0
Failed models: ReportParser::UnderwritingData::ApplicationRecord
96 mock(s) out of 98 failed.
To see more/less detail set error_verbosity = 0, 1, 2, 3

[zeisler]

As possible solution create an inclusive or exclusive config file as the source for generating mocks.