0.28.2 update causing node to use too much storage

[heunland]

Changelog v0.28.2

Warning: Garbage collection is messing up the free space calculation. If your storage node is full and executes garbage collection it might accept more pieces than it has free space. At the end it will get disqualified. We are working on a fix. Please reduce your allocated size to make sure the storage node is not running into a crash.