Update to enable group write permissions to the
tachyon.worker.data.folder to fix issue #123
Make ufscluster singleton for the entire jvm process
Enable integration test for LocalTachyonClusterMultiMaster
Disable the client instance cache in hdfs to avoid certain FileSystem closed exception issue.
Make disable.cache=true only work for test.
Disable the hdfs client instance cache for JournalTest
Update on issue #123 per review to use internal utilities and avoid Java
7 dependencies.  The permissions were not still restricted to 775.
Removal of hard-tabs on issue #123 and update comment block
Merge pull request #133 from GraceH/integrationPerf

Make ufscluster singleton for the entire jvm process
fix unit tests for integration
Merge remote-tracking branch 'upstream/master' into tachyon-123

Conflicts:
	src/main/java/tachyon/util/CommonUtils.java
Shift off -s arg to make Format class happy
Merge pull request #134 from nicklan/tachyon-script-fix

Shift off -s arg to make Format class happy
Merge pull request #128 from timothysc/tachyon-123

Update to enable group write permissions to the tachyon.worker.data.folder
improve logging and comments
format test/tachyon
coding style
format test/tachyon/client
tests reorders
order all the code