FISH-5802 Exclude .gitkeep File From Payara Micro

[Pandrex247]

Description

Take two of #5456

The file .gitkeep is not required in the unpacked runtime directory of the Payara Micro instance and its presence prevents using the CDS capabilities fully on JDK17.

Important Info

Blockers

None

Testing

New tests

None

Testing Performed

Built and checked manually - no .gitkeep present in any folder within Payara Micro

On JDK 17:

• java -jar payara-micro.jar --rootdir micro-root --outputlauncher
• java -XX:ArchiveClassesAtExit=payara.jsa -jar micro-root/launch-micro.jar --warmup --deploymentDir deployment --nocluster
• java -jar -XX:SharedArchiveFile=payara.jsa micro-root/launch-micro.jar
• Should start with no errors

Testing Environment

Windows 10, JDK 17.0.1

Documentation

N/A

Notes for Reviewers

I let IntelliJ do a formatting sweep because the indentation of the file made me cringe.
If you want to see the actual functionality change, just look at commit 91f883e

[Pandrex247]

Jenkins test please

[aubi]

LGTM