Added start-metastore.sh and stop-metastore.sh scripts, which start and stop
the metastore silently.
From: Aaron Kimball <aaron@cloudera.com>
git-svn-id: https://svn.apache.org/repos/asf/incubator/sqoop/trunk@1149972 13f79535-47bb-0310-9956-ffa450edef68