bug fix for new test in TachyonURITest
TACHYON-253 Add volatile modifier for EditLogProcessor.mIsStandby to make sure it read/write from main memory.
Simple typo fix of the JournalTest.CompletedEditLogDeletionTest method name.
Merge pull request #576 from hsaputra/fix_typo_CompletedEditLogDeletionTest_method

Simple typo fix of the JournalTest.CompletedEditLogDeletionTest method name
Merge pull request #575 from hsaputra/TACHYON-253_add_volatile

TACHYON-253 Add volatile modifier to EditLogProcessor.mIsStandby to guarantee visibility
Merge pull request #569 from uronce-cc/TACHYON-240

[TACHYON-240] bug fix for new join test in TachyonURITest
close TachyonFS when closing AbstractTFS
Merge pull request #578 from shimingfei/CloseTachyonFS

close TachyonFS when closing AbstractTFS
remove unused FileDoesNotException for getFileStatus - thrift change
remove unused FileDoesNotException for getFileStatus - non-thrift change
Merge pull request #580 from shimingfei/RemoveExceptionForGetFileStatus

Remove exception for get file status