Pricenode: Add JVM flag ExitOnOutOfMemoryError

[alkum]

Add flag that causes the JVM to exit with exit code 3 whenever there is an OutOfMemory exception for the pricenode service, which causes the systemd bisq-pricenode service to restart.

Can be tested by running the pricenode on a VM with very little memory, or by artificially limiting the JVM memory in addition to this flag: -Xmx10m -XX:+ExitOnOutOfMemoryError. The tests should result in an endless restart cycle for the pricenode service (sudo systemctl status bisq-pricenode should show service uptime of max 1-2 seconds each time it's called).

Fixes #6225

[boring-cyborg]

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[ghost]

You could do the same for seednode, to resolve issue #6225.

bisq/seednode/bisq.env

Lines 1 to 8 in ad15fcd

	# configuration for bisq service
	# install in /etc/default/bisq.env
	# java home, set to openjdk 10
	JAVA_HOME=/usr/lib/jvm/openjdk-10.0.2
	# java memory and remote management options
	JAVA_OPTS="-Xms4096M -Xmx4096M"

[alkum]

Done.

[ripcurlx]

utACK

[boring-cyborg]

Awesome work, congrats on your first merged pull request!

[wiz]

Thank you 🙏