Update register_foreman.rb

[mwelk-rh]

This change addresses the following issues:

• Some error handling, the script exists when it cannot find the required data in the database.
• The former search covered all values of the data search through, like all records of a table, and it did a substring search. So it was never sure if it found the right data, and if the results were unique. It was using the first reply of a query. To clean this, I added a field to search to query_id, and made it search exactly for the string in that field. If it finds no result or more than one, it considers that both invalid answers.
• I added some error handling.
• The URL wasn't safe for special characters like spaces. Since they are allowed in Satellite, we should handle them correctly.
• Chris, please check it MIQ_ERROR is right.
• I haven't been able to test this inside CF yet.

[cbolz]

It's MIQ_ABORT - but everything else looks fine, thx.