FOG 2.0 request: Host system import / export improvements

[george1421]

Add the field names to the export hosts csv file. Add logic to ignore first row on import assuming the first row is the field names.

This is to allow the IT technician to see the expected input information based on the column (field) names. Right now it is not clear what fields (columns) are supported and the expected order for the data to be imported correctly.

Expected workflow: Export hosts to csv spreadsheet (blank or populated), fill in new data in correct column order, and then import the csv.