[java] Microprofile - fix optional array property's default value

[hightea]

Apply what has be done for optional array property's default value for microprofile ( #14961 did it for java , native and jersey, but not for microprofile)

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[wing328]

can you please merge the latest master into your branch and update the samples?

https://github.com/OpenAPITools/openapi-generator/actions/runs/6074641581/job/16479512246?pr=16500

[hightea]

My bad, I had an unclean maven workspace.
However I've some difficulties to build the project behind my company proxy.
I'm going to run a full build on an other computer

[wing328]

LGTM. Thanks for the fix.