Test scripts: change recovery test script to start and shutdown chunk and meta servers by default, extend test coverage by using multiple different test RS block sizes.
Test scripts: change recovery test script to start and shutdown chunk and meta servers by default, extend test coverage by using multiple different test RS block sizes.

fengshao0907/qfs,thebigbrain/qfs,fengshao0907/qfs,chanwit/qfs,chanwit/qfs,quantcast/qfs,fengshao0907/qfs,quantcast/qfs,chanwit/qfs,thebigbrain/qfs,quantcast/qfs,chanwit/qfs,chanwit/qfs,fengshao0907/qfs,chanwit/qfs,thebigbrain/qfs,quantcast/qfs,thebigbrain/qfs,qnu/qfs,quantcast/qfs,thebigbrain/qfs,qnu/qfs,fengshao0907/qfs,qnu/qfs,chanwit/qfs,qnu/qfs,thebigbrain/qfs,fengshao0907/qfs,quantcast/qfs,fengshao0907/qfs,thebigbrain/qfs,qnu/qfs,fengshao0907/qfs,qnu/qfs,quantcast/qfs,quantcast/qfs,chanwit/qfs,qnu/qfs,qnu/qfs,thebigbrain/qfs