ZOOKEEPER-2992: The eclipse build target fails due to protocol redirection: http->https

ZOOKEEPER-2992 is the Jira issue.

Author: Shawn Heisey <elyograg@apache.org>

Reviewers: Edward Ribeiro <edward.ribeiro@gmail.com>, Andor Molnár <andor@cloudera.com>, Michael Han <hanm@apache.org>

Closes #479 from elyograg/master

build.xml

@@ -1805,7 +1805,7 @@ xmlns:cs="antlib:com.puppycrawl.tools.checkstyle.ant">
      </condition>
 
      <target name="ant-eclipse-download" unless="ant-eclipse.jar.exists">
-       <get src="http://downloads.sourceforge.net/project/ant-eclipse/ant-eclipse/1.0/ant-eclipse-1.0.bin.tar.bz2"
+       <get src="https://downloads.sourceforge.net/project/ant-eclipse/ant-eclipse/1.0/ant-eclipse-1.0.bin.tar.bz2"
             dest="${src.dir}/java/ant-eclipse-1.0.bin.tar.bz2" usetimestamp="false" />
 
        <bunzip2 src="${src.dir}/java/ant-eclipse-1.0.bin.tar.bz2"/>