Set logging_level_stream when defaults are unavailable
Set logging_level_stream when defaults are unavailable

Fixes this error when invoking intelmqctl on my plain Ubuntu 18.04 LTS install:

UnboundLocalError: local variable 'logging_level_stream' referenced before
assignment

aaronkaplan/intelmq,certtools/intelmq,certtools/intelmq,aaronkaplan/intelmq,aaronkaplan/intelmq,certtools/intelmq