[Java*] Default value missing for operation parameters

Description

Default values for operation parameters are not available in the CodegenParameter.

Sample: findPetsByStatus
parameter status default: available

This default value is not showing up in the generated samples.
For model properties this is working, e.g. Animal.java has color = default: red and this gets generated correctly.

Swagger-codegen version

2.2.3-SNAPSHOT

Swagger declaration file content or url

see petstore-with-fake-endpoints-models-for-testing.yaml

Command line used for generation

jaxrs-cxf-cdi-petstore-server.sh

Steps to reproduce

generate e.g. cxf-cdi and the defaultValue for status doesn't show up in the generated @ApiParam-annotation

Related issues

#4928: @ApiParam also contains defaultValue and is never populated
#4776: @Default is implemented for jaxrs-cxf-cdi queryParams but never populated

Suggest a Fix

Probably the defaultValue is not even parsed using swagger-jaxrs.
Currently it doesn't show up in the mustache variable defaultValue.

Start with petstore-with-fake-endpoints-models-for-testing.yaml and the jaxrs-cxf-cdi-petstore-server.sh generation command, then trace how the operation parameter default reaches CodegenParameter and the Mustache defaultValue variable. Compare the generated @ApiParam annotation with the model-property behavior; done means the status parameter's defaultValue is present in generated samples.