forked from loafle/openapi-generator-original
When WorkflowSettings was constructed from an existing instance, as is
the case when we deserialize from an external configuration file, it
would result in an error:
Caused by: java.lang.UnsupportedOperationException
at com.google.common.collect.ImmutableMap.put(ImmutableMap.java:450)
at org.openapitools.codegen.config.WorkflowSettings$Builder.withSystemProperty(WorkflowSettings.java:465)
This was due to an error in `newBuilder(WorkflowSettings copy)` which
assigned builder.systemProperties with an immutable map. This is
incorrect because everything in the builder should be mutable until
.build() is invoked.
This likely affects CLI/Maven plugin as well for version 4.1.1 through 4.2.0.