Adaption of hosts-files

[Christian Bickel <ap...@cbickel.de>]

Hi all,

last week, Markus and me created a pull request, which enables the possibility to deploy several controllers and invokers on one machine with ansible.
https://github.com/apache/incubator-openwhisk/pull/2633 (https://github.com/apache/incubator-openwhisk/pull/2633)

After this PR is merged, it is required, that "ansible_host" is specified for each host in the environment's hosts file. Otherwise there will be errors on the ansible task `properties.yml` (which is also executed on logs.yml, postdeploy.yml and routemgmt.yml).

This is already done for the dafault environments. A change is only needed, if you have a own environment.

Thanks for your understanding.

Greetings
Christian