Description of problem:

currently we need to enter an interactive menu to install fusor. 
even when we fail the installation, we need to go back to the interactive menu and change things manually. 
I think it would be easier to: 

1. run fusor from an answer file using --answer-file option
2. create an answer file after the user runs the installation from the interactive installer so that any other runs can be done from this file as well as a backup/share between sites if needed. 

Version-Release number of selected component (if applicable):

fusor-installer-0.0.14-1.el7eso.noarch

How reproducible:

100%

Steps to Reproduce:
1. install a server from the RHCI ISO 
2. run fusor-installer with a wrong ntp server
3.

Actual results:

we can only run fusor from the interactive installer and have no way to run it from an answer file. 
After the failure, we need to go into the fusor installer interactive installer to make the change manually and re-run it. 

Expected results:

1. it would be a good addition to fusor to allow running it with an answer file
2. it would be a good addition to automatically create an answer file after the manual run of the interactive installer
3. it would be a good addition to allow editing the answer file after the installation failed or if you need to change anything using an answer file. 

Additional info: