[Bug] EventTypeMetadataV2 embedded source fork is outdated

[andrewazores]

          I see two issues here, the good news is that one of them is already fixed and is just missing in cryostat-core.

2024-01-22 10:19:38,997 WARNING [org.ope.jmc.rjm.ser.jfr] (executor-thread-1) Inferred content type 'jdk.jfr.Period' for option Period

This was fixed in https://bugs.openjdk.org/browse/JMC-6141 (JMC 8.1.0), the problem looks to be that EventTypeMetadataV2 in cryostat-core didn't receive the change when it was updated to consume 8.2.0. The line at https://github.com/cryostatio/cryostat-core/blob/main/src/main/java/org/openjdk/jmc/rjmx/services/jfr/internal/EventTypeMetadataV2.java#L55 will need to be updated like: openjdk/jmc@e34323d#diff-9aa914b001864ae2b91cba7f4382a652ffecb05275c650d54b2155658ee03865L55

2024-01-22 10:19:38,997 WARNING [org.ope.jmc.fli.configuration] (executor-thread-1) Couldn't find constraint for null

I put in some quick logging and it looks to be that when resolving contentType, jdk.settings.Throttle isn't being handled properly and falls through as null. I'll make a note to poke around here a bit more and open a bug upstream JMC side.

Originally posted by @aptmac in cryostatio/cryostat#249 (comment)

[andrewazores]

This is technically a separate pre-existing issue, but it should get resolved by #362.