[Go] Duplicate constant names for enums with same values

Created by: moser4035

Description

I've defined enums that contain same values (see below) The openapi-generator creates constants with the same names. But this is not allowed and the code does not compile anymore.

I get an error like this:

previous declaration at ../go-client/model_color_primaries.go:18:28
../go-client/model_color_space.go:20:26: SMPTE170_M redeclared in this block

used openapi-generator version: 3.0.3

OpenAPI declaration file content or url

ColorSpace:
  title: ColorSpace
  enum:
  - UNSPECIFIED
  - SMPTE170M
  - SMPTE240M

ColorPrimaries:
  title: ColorPrimaries
  enum:
  - UNSPECIFIED
  - SMPTE170M
  - SMPTE240M

Generated Go code

file model_color_space.go:

        type ColorSpace string

        const (
	        UNSPECIFIED ColorSpace = "UNSPECIFIED"
	        SMPTE170_M ColorSpace = "SMPTE170M"
	        SMPTE240_M ColorSpace = "SMPTE240M"
        )

file model_color_primaries.go:

        type ColorPrimaries string

        const (
	        UNSPECIFIED ColorPrimaries = "UNSPECIFIED"
	        SMPTE170_M ColorPrimaries = "SMPTE170M"
	        SMPTE240_M ColorPrimaries = "SMPTE240M"
        )

Command line used for generation

java -jar /opt/openapi-generator-cli.jar generate -g go -i openapi.json -o /go/src/go-client

Suggest a fix/enhancement

Maybe this could be solved by adding a prefix to the constants of the enum