Bah...
Description of problem:
When user tries to provide an invalid manifest to katello-disconnected, it returns a trace.  It should return a message similar to that which is thrown when user enters a non existent file.

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


How reproducible:


Steps to Reproduce:
1. get a zip file that is not an export.
2. katello-disconnected import --manifest not_a_manifest.zip
3. View results.

Actual results:
[root@ivanova ~]# katello-disconnected import --manifest not_a_manifest.zip 
/opt/rh/ruby193/root/usr/share/rubygems/rubygems/custom_require.rb:36:in `require': iconv will be deprecated in the future, use String#encode instead.
unzip:  cannot find or open /tmp/tmp.tEJ0FFGHwP/consumer_export.zip, /tmp/tmp.tEJ0FFGHwP/consumer_export.zip.zip or /tmp/tmp.tEJ0FFGHwP/consumer_export.zip.ZIP.
/usr/share/katello-disconnected/lib/manifest_reader.rb:318:in `read': No such file or directory - /tmp/tmp.tEJ0FFGHwP/export/meta.json (Errno::ENOENT)
	from /usr/share/katello-disconnected/lib/manifest_reader.rb:318:in `initialize'
	from /usr/bin/katello-disconnected:312:in `new'
	from /usr/bin/katello-disconnected:312:in `import'
	from /usr/bin/katello-disconnected:405:in `<main>'


Expected results:
Validation of file and handle an invalid type gracefully, similar to what appears when user enters a filename that doesn't exist:
Provide a valid file: not_a_manifesto.zip

Additional info:

The katello-disconnected server synchronization and export functions are being moved into the Satellite server itself. With 6.2, the katello-disconnected command will no longer be delivered and instead will be replaced with a new export and import functions delivered via the UI and hammer CLI. This bug is being closed as "WONTFIX" since it relates only to the existing katello-disconnected tooling. Please check the Satellite docs with the release of Satellite 6.2 on how to use the new content export and import features.