Client library: implement get data location variant which returns "block" size and data locations for all "blocks" for the specified file and byte range. The block size is equal to the "chunk block size": for non striped files the chunk block size equal to chunk size, and for the striped files the block size is equal to the chunk size multiplied by the number of data stripes.
Tools: qfs tool use newly implemented get data location method to report files "chunk blocks" locations / placement. Display blocks start positions / offset.
Qfs access: implement "get blocks locations" jni method that reports "chunk blocks" locations, along with the "chunk block" size. The first location slot is always used to pass "chunk block" size, or error code. If the "chunk block size" value in the first slot is negative, then it means the there was an error retrieving the blocks locations.