Add Hive DIB element

Change-Id: Iac3a13f2a70fd8888fc81c04629f2c696199d2a5

elements/hive/README.md

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+Installs Hive on Ubuntu and Fedora.
+Hive stores metadata in MySQL databases. So, this element requires 'mysql' element.
+You can specify download link for Hive using parameter 'HIVE_DOWNLOAD_URL' or choose Hive version using parameter 'HIVE_VERSION'.

elements/hive/element-deps

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+hadoop
+mysql

elements/hive/post-install.d/60-hive

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+#!/bin/bash
+install-packages wget tar
+
+tmp_dir=/tmp/hive
+mkdir -p $tmp_dir
+cd $tmp_dir
+
+if [ -z $HIVE_DOWNLOAD_URL ]; then
+  HIVE_DOWNLOAD_URL=http://www.apache.org/dist/hive/hive-$HIVE_VERSION/hive-$HIVE_VERSION-bin.tar.gz
+fi
+wget $HIVE_DOWNLOAD_URL
+if [ $? -ne 0 ]; then
+   echo -e "Could not download hive.\nAborting"
+   exit 1
+fi
+HIVE_FILE=$(basename $HIVE_DOWNLOAD_URL)
+tar xzf $HIVE_FILE
+HIVE_DIR="${HIVE_FILE%.*}"
+HIVE_DIR="${HIVE_DIR%.*}"
+mv $HIVE_DIR /opt/hive
+rm -r $tmp_dir
+chmod -R a+rw /opt/hive
+
+ln -s /usr/share/java/mysql-connector-java.jar /opt/hive/lib/libmysql-java.jar
+chown -R hadoop:hadoop /opt/hive
+cat >> /home/hadoop/.bashrc <<EOF
+HIVE_HOME=/opt/hive
+PATH=\$PATH:\$HIVE_HOME/bin
+EOF

elements/hive/root.d/0-check

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+#!/bin/bash
+if [ -z "$HIVE_DOWNLOAD_URL" ]; then
+  version_check=$(echo $HIVE_VERSION | sed -e '/[0-9]\.[0-9][0-9]\.[0-9]/d')
+  if [ ! -z $version_check ]; then
+    echo -e "Unable to install Hive: You should specify HIVE_DOWNLOAD_URL or HIVE_VERSION.\nAborting"
+    exit 1
+  fi
+fi