No need for changing hosts file + expose ports on run command

[jonatasbaldin]

As specified in the HBase Book, since version hbase-0.96.0 there's no need to change the /etc/hosts file.

Also, to access the the container ports from your machine, you should expose the ports to the host. This can be done in two ways:

• On the docker run command, such as (exposing just 16010):
  docker run --name=hbase-docker --rm -p 16010:16010 -d -v $PWD/data:/data dajobe/hbase

• On the Dockerfile:
  EXPOSE 16010:16010

I got it working skipping the /etc/hosts configuration and running the command above.

What do you think?