ZOOKEEPER-3273: Sync BouncyCastle version in Maven build and Ant build

Uee 1.60 in Ant, the same version used in Maven

Author: Enrico Olivelli <eolivelli@apache.org>

Reviewers: andor@apache.org

Closes #808 from eolivelli/fix/ZOOKEEPER-3273

build.xml

@@ -44,7 +44,7 @@ xmlns:cs="antlib:com.puppycrawl.tools.checkstyle.ant">
     <property name="checkstyle.version" value="7.1.2"/>
     <property name="commons-collections.version" value="3.2.2"/>
 
-    <property name="bouncycastle.version" value="1.56"/>
+    <property name="bouncycastle.version" value="1.60"/>
 
     <property name="jdiff.version" value="1.0.9"/>
     <property name="xerces.version" value="1.4.4"/>