Added support for software->optional_default_patterns

- bnc#876760
Changes and new version
More exact description
Merge pull request #14 from kobliha/recommended_patterns

Added support for software->optional_default_patterns
allow set default for os_probing per product (bnc#884007)
release
use better name and document default
Merge pull request #15 from yast/disable_os_probe

Disable os probe