[Java][JVM Logs][GC Logs] Monday with JVM logs - heap before GC

JMX monitoring

The Heap before GC chart can be generated by probing through JMX. You can generate it the same way as Heap after GC but insted of #memoryUsageAfterGc you need to fetch #memoryUsageBeforeGc property.

TODO - article will be finished by 02.08.2021