[java][microprofile] implement useRuntimeException

[ssaip]

This will make the generated ApiException extend RuntimeException for microprofile clients, if useRuntimeException is set to true.

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[wing328]

Thanks for the PR.

cc @bbdouglas (2017/07) @sreeshas (2017/08) @jfiala (2017/08) @lukoyanov (2017/09) @cbornet (2017/09) @jeff9finger
(2018/01) @karismann (2019/03) @Zomzog (2019/04) @lwlee2608 (2019/10)

[wing328]

tested locally and the result is good

thanks for the PR.

[wing328]

FYI. Filed #14452 to update the description of the option.