As we discussed in TAJO-305, the name 'killQuery' is wrong and does not represent its purpose. This patch renames killQuery to closeQuery. This is a trivial change.
SUCCESS: Integrated in Tajo-master-build #3 (See https://builds.apache.org/job/Tajo-master-build/3/)
TAJO-477: Rename killQuery of QMClientProtocol to closeQuery. (hyunsik: https://git-wip-us.apache.org/repos/asf?p=incubator-tajo.git&a=commit&h=3c91fe06ee3bcf7284beabf332af1d747f758c94)
committed it to master branch.