Fixed java-web-spring quotas to be able to run on OSIO

[ScrewTSW]

What does this PR do?

This PR fixes the Java Springboot devfile memory quotas in order to be able to run the image on OSIO

What issues does this PR fix or reference?

Issue: https://github.com/redhat-developer/che-functional-tests/issues/556

[amisevsk]

I was able to generate an OOMKilled for the java language server; it seems like the java limit could safely be increased by ~200Mi and stay within quota, though, so that may fix it.

[ScrewTSW]

so upon investigation there are three constants consuming quota limits:

• JWT Proxy consumes 150MiB
• Machine exec pod consumes 150MiB
• Theia consumes 512MB = 488.281MiB

and the plugins defined in the devfile:

• Java LSP : (value unset) -> changed to 1512MiB - Should definitely be enough to avoid LSP OOM restart
• tools (maven) : 1024MiB (pointlessly large,-256MiB new value 768MiB)

That leaves me 1259.71875MiB to work with. After redistribution this leaves me exactly 3899392 bytes to spare or 3.71875MiB .

Java LSP peaked at 1258MiB
tools (maven) peaked at 385MiB even after rigorous usage

[amisevsk]

This could potentially be dropped, as the default used for redhat/java/latest is 1500Mi. However this would mean any increases to the plugin-registry default would break this devfile again.