Update to ZK 3.5.7 (#239)

diff --git a/conf/checksums b/conf/checksums
index a7e23ff..7a4d93b 100644
--- a/conf/checksums
+++ b/conf/checksums
@@ -21,6 +21,7 @@
 hadoop:2.7.5:0bfc4d9b04be919be2fdf36f67fa3b4526cdbd406c512a7a1f5f1b715661f831
 hadoop:2.6.5:001ad18d4b6d0fe542b15ddadba2d092bc97df1c4d2d797381c8d12887691898
 spark:2.3.2:79d1de6870cf43ecc059d4423540124610ef00abc929c171be42548b505f115906e251e4604ed7d22b6a8cce012a845d90017319c2abb3d5d700369b1c335c6d
+zookeeper:3.5.7:b9baa1ecb3d4dc0ef648ce7c74da4c5267ee89534c7614b8f27d3b0bc52004dcfbb8cecec810ffb7c8c45053daf8a5e849ce60ba241280fa1e2ab1d3b4990494
 zookeeper:3.4.14:b14f7a0fece8bd34c7fffa46039e563ac5367607c612517aa7bd37306afbd1cd
 zookeeper:3.4.13:3481bd19945d80848f81d9dc2896a682ae8b62269b8164ffbae532e55aa4219961403e0208c8e72cf784605eae436d70ddae2b26e0deba0f1f84c74188c32c0a
 zookeeper:3.4.12:c686f9319050565b58e642149cb9e4c9cc8c7207aacc2cb70c5c0672849594b9
diff --git a/conf/uno.conf b/conf/uno.conf
index 4083ec0..1e10f40 100644
--- a/conf/uno.conf
+++ b/conf/uno.conf
@@ -4,7 +4,7 @@
 # Versions
 # --------
 export HADOOP_VERSION=${HADOOP_VERSION:-3.2.1}
-export ZOOKEEPER_VERSION=${ZOOKEEPER_VERSION:-3.4.14}
+export ZOOKEEPER_VERSION=${ZOOKEEPER_VERSION:-3.5.7}
 export ACCUMULO_VERSION=${ACCUMULO_VERSION:-2.0.0}
 export FLUO_VERSION=${FLUO_VERSION:-1.2.0}
 export FLUO_YARN_VERSION=${FLUO_YARN_VERSION:-1.0.0}
@@ -31,7 +31,7 @@
 # Tarball file names
 export ACCUMULO_TARBALL=accumulo-$ACCUMULO_VERSION-bin.tar.gz
 export HADOOP_TARBALL=hadoop-"$HADOOP_VERSION".tar.gz
-export ZOOKEEPER_TARBALL=zookeeper-"$ZOOKEEPER_VERSION".tar.gz
+export ZOOKEEPER_TARBALL=apache-zookeeper-"$ZOOKEEPER_VERSION"-bin.tar.gz
 export FLUO_TARBALL=fluo-$FLUO_VERSION-bin.tar.gz
 export FLUO_YARN_TARBALL=fluo-yarn-$FLUO_YARN_VERSION-bin.tar.gz
 
@@ -116,7 +116,7 @@
 # Directory where all Fluo dependencies store their data
 export DATA_DIR=$INSTALL/data
 # Home directories
-export ZOOKEEPER_HOME=$INSTALL/zookeeper-$ZOOKEEPER_VERSION
+export ZOOKEEPER_HOME=$INSTALL/apache-zookeeper-$ZOOKEEPER_VERSION-bin
 export HADOOP_HOME=$INSTALL/hadoop-$HADOOP_VERSION
 export ACCUMULO_HOME=$INSTALL/accumulo-$ACCUMULO_VERSION
 export FLUO_HOME=$INSTALL/fluo-$FLUO_VERSION