TAJO-1166: S3 related storage causes compilation error in Hadoop 2.6.0-SNAPSHOT

I implemented for this issue as follows.
- Replace S3 to LocalFileSystem for unit test cases
- Added container package (borrowed from hadoop-2.5.1)

You can build tajo on both hadoop-2.5.1 and hadoop-2.6.0-SNAPSHOT.

mvn clean install -Dhadoop.version=2.6.0-SNAPSHOT
mvn clean install -Dhadoop.version=2.5.1

For reference, we need to implement our own container in the long-term.