AUTH_SYS support with user/group configuration files

In this release, we changed the implementation of AUTH_SYS support. Users can specify their username/id and groupname/id used for AUTH_SYS authentication in separate configuration files. Details are listed in CONFIG.md.
Moreover, we found bugs in hadoop-nfs-2.6.0.jar, and you need to replace it with hadoop-nfs-3.0.0-SNAPSHOT.jar attached below to make the connector work.

TR-4082

This is the first full release of NetApp NFS Connector for Hadoop (internal version v1.0.4).

• It supports NFSv3 connections to a NFS server.
• It uses AUTH_NONE and AUTH_SYS authentications
• It supports connections to multiple NFS servers by using an config file (see CONFIG.md)

To learn more about how to use the code, please read the README.md and CONFIG.md. More details on the cluster configuration and performance results with a 8-node Hadoop cluster are published in the TR which can be viewed here: http://www.netapp.com/us/system/pdf-reader.aspx?pdfuri=tcm:10-133006-16&m=tr-4382.pdf

This is internal version 1.0.4.