Add nightly builds for Hadoop 1.x and Hadoop 2.x

[Edward J. Yoon]

Hi all,

I've renamed our (existing) nightly job from Hama-Nightly to
Hama-Nightly-for-Hadoop-1.x. and I'll create new
Hama-Nightly-for-Hadoop-2.x after patching HAMA-717.

Thanks.

-- 
Best Regards, Edward J. Yoon
@eddieyoon