Restore Glusterfs with update 

Migrate glusterfs-hadoop to maven central from s3; update versions; add configuration setting documentation.
Seems this one does not do a full test like for HDFS. For HDFS, it does the following: 

in pom.xml:
<properties>
        <ufs>tachyon.LocalMiniDFSCluster</ufs>
</properties>

In code:
https://github.com/amplab/tachyon/blob/master/main/src/test/java/tachyon/UnderFileSystemCluster.java