On Windows, the following output is seen when starting Zookeeper and Kafka servers:
```
'#' is not recognized as an internal or external command,
operable program or batch file.
```
This pull request makes a minor correction to the Windows `kafka-run-class.bat` script to replace the use of `#` with `rem`.
Author: P. Thorpe <paul.thorpe@uk.ibm.com>
Reviewers: Vahid Hashemian, Gwen Shapira
Closes#1740 from p-thorpe/trunk