ZOOKEEPER-2951: remove trailing \ from JAVA_HOME

 fixes ZOOKEEPER-2951

Author: Jorg Heymans <jorg.heymans@gmail.com>

Reviewers: phunt@apache.org

Closes #431 from jorgheymans/master

Change-Id: Id47651ebdbb29574b47863640e928b6a99af6920

bin/zkEnv.cmd

@@ -46,5 +46,8 @@ if not exist "%JAVA_HOME%"\bin\java.exe (
   goto :eof
 )
 
+REM strip off trailing \ from JAVA_HOME or java does not start
+if "%JAVA_HOME:~-1%" EQU "\" set "JAVA_HOME=%JAVA_HOME:~0,-1%"
+ 
 set JAVA="%JAVA_HOME%"\bin\java