Description of problem:
Deploying on a remote host requires 
"he_ansible_host_name" parameter set in the json file.
Without it, the user will get a error regarding to connection(failed to ssh or sudo: a password is required).
These errors are unrelated to the real problem - the missing parameter.

Version-Release number of selected component (if applicable):
ovirt-ansible-hosted-engine-setup-1.0.15-1.el7ev.noarch

How reproducible:
100%

Steps to Reproduce:
1. Deploy HE using the ansible role, missing he_ansible_host_name parameter in the json file.
2. Check the error/s given.

Actual results:
Errors are shown as:
fatal: [ocelot05.qa.lab.tlv.redhat.com -> compute-ge-he-6.qa.lab.tlv.redhat.com]: FAILED! => {"changed": false, "elapsed": 192, "msg": "timed out waiting for ping module test success: Failed to connect to the host via ssh: ssh: connect to host compute-ge-he-6.qa.lab.tlv.redhat.com port 22: Connection timed out"}

And:
fatal: [ocelot05.qa.lab.tlv.redhat.com -> localhost]: FAILED! => {"changed": false, "module_stderr": "sudo: a password is required\n", "module_stdout": "", "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", "rc": 1}

Expected results:
Error regarding the missing parameter he_ansible_host_name.