framework: Initial attempt to unify logging
    
    Since logging was dropped from setroubleshoot, there was no way how to
    configure logging level in sealert and setroubleshoot.
    
    There's log_debug() which is more hack than anything and even it's used
    in setroubleshoot, it took level value from [sealert_log] what is
    confusing.
    
    This commit allows to use different levels for sealert and
    setroubleshootd.