Fix syntax

Fixes

```bash
Step 12 : RUN echo "Dropping current cluster" &&
 ---> Running in 22e7d796c4ca
/bin/sh: 1: Syntax error: end of file unexpected
2014/05/08 18:13:59 The command [/bin/sh -c echo "Dropping current cluster" &&] returned a non-zero code: 2
make: *** [build] Error 1
```