Add Hive and Hadoop dependencies to the pom.xml

These dependencies where missing!!

    <dependency>
      <groupId>com.facebook.hadoop</groupId>
      <artifactId>hadoop-core</artifactId>
      <version>0.20.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.hive</groupId>
      <artifactId>hive-exec</artifactId>
      <version>0.12.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.hive</groupId>
      <artifactId>hive-jdbc</artifactId>
      <version>0.12.0</version>
    </dependency>