Update CentOS dockerfile
Update CentOS dockerfile

The CentOS dockerfile is out of date and results in a non-runnable Che
container.

Signed-off-by: Angel Misevski <281ea56516bb94e50c635e8fd71c9c19f3091382@redhat.com>

codenvy/che,codenvy/che,codenvy/che,codenvy/che