Update the documentation flow of tooling references for memory analysis

[cchesser]

Consider making updates to the flow of the workshop:

• JOverflow first: Simple and guides them to problematic areas
• Eclipse MAT OQL starter to get familar how to ask specific questions about a heap dump
• Eclipse MAT plugin for expert-mode (mat-calcite-plugin: More extensive type SQL-like statements
• VisualVM
• Workshop for them to find the problem (memory leak)

[AnEmortalKid]

All subitems completed!