Fix lib/openapi_client.rb import error

[vanessa-passage]

Prerequisites

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• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed
• I'm reporting the issue to the correct repository (for multi-repository projects)

Expected Behavior

lib/openapi_client.rb should not produce errors when generated.

Current Behavior

The lib/openapi_client.rb file errors when files are required. The current work around is to change the require to require_relative must be fixed every time files are generated.