BootZipCopyAction opens stream twice

[philwebb]

these lines in BootZipCopyAction are causing library.openStream() to be called twice. The prepareStoredEntry method will close the stream so the try with resources block shouldn't be needed.

[namest504]

I'd like to work on this. Can you assign me?

[HyunKN]

Hi, I'd like to work on this issue. Please let me know if it's available.

[wilkinsona]

Thanks for the offer, @namest504. It's all yours. Please use 3.4.x as the base branch for any PR that you open.