HAMA-557 HAMA-610 HAMA-611 HAMA-587 fixes committing to HAMA-505-branch

git-svn-id: https://svn.apache.org/repos/asf/hama/branches/HAMA-505-branch@1369551 13f79535-47bb-0310-9956-ffa450edef68
44 files changed