Upgraded Hadoop to 2.7.5 (#167)

diff --git a/conf/uno.conf b/conf/uno.conf
index 40a2fbf..3741e77 100644
--- a/conf/uno.conf
+++ b/conf/uno.conf
@@ -3,7 +3,7 @@
 
 # Versions
 # --------
-export HADOOP_VERSION=2.7.4
+export HADOOP_VERSION=2.7.5
 export ZOOKEEPER_VERSION=3.4.11
 export ACCUMULO_VERSION=1.8.1
 export SPARK_VERSION=1.6.3
@@ -15,7 +15,7 @@
 # Hashes below match default versions above. If you change a version above,
 # you must also change the hash below.
 export FLUO_HASH=9765f48ac2a075129905b1bac96e7ca6c735264ddb9aeeee15282ed5f8bc1062
-export HADOOP_HASH=8f791bfcfa5bb7c7ccd09910d490c02910dda93b19936ec2aedb8930bc5be111
+export HADOOP_HASH=0bfc4d9b04be919be2fdf36f67fa3b4526cdbd406c512a7a1f5f1b715661f831
 export ZOOKEEPER_HASH=f6bd68a1c8f7c13ea4c2c99f13082d0d71ac464ffaf3bf7a365879ab6ad10e84
 export ACCUMULO_HASH=eba3bfe823935ca7901ea7c2bd59c84a68b9381361699c7e260bbd9191f237f4
 export SPARK_HASH=d13358a2d45e78d7c8cf22656d63e5715a5900fab33b3340df9e11ce3747e314