Required a new regression test for minimal Xmx.

Quoting: https://docs.oracle.com/javase/8/docs/technotes/tools/unix/java.html

-Xmxsize

    Specifies the maximum size (in bytes) of the memory allocation pool in bytes. This value must be a multiple of 1024 and greater than 2 MB.

The test should check:
- VM doesn't start if Max Heap Size < 2m
- VM starts if Max Heap Size == 2m (the value of maxHeapSize must be >= 2m)