Description of problem:
Currenly evenly_distributed policy does not include memory by default and the MinFreeMemoryForUnderUtilized and MaxFreeMemoryForOverUtilized keys needs to be explicitly set.
The main reason for this was backwards compatibility and by 4.3 we should be able to change it and make the default more useful with memory included.
Autodetecting the proper values is not easy as it depends on host sizes and VM sizes. We can reconsider this if we have an actual user story.