chore(karma.conf.js): don't use DEBUG logLevel
chore(karma.conf.js): don't use DEBUG logLevel

It's noisier than is necessary...

nylas/inbox.js,MobileWorks/inbox.js,iconartus/inbox.js,iconartus/inbox.js,iconartus/inbox.js,nylas/inbox.js,MobileWorks/inbox.js,MobileWorks/inbox.js