tests/stub_conn: add empty notes object
tests/stub_conn: add empty notes object

avoids plugins having to set it up for themselves dozens of times

hiteshjoshi/my-haraka-config,abhas/Haraka,zombified/Haraka,jjz/Haraka,slattery/Haraka,AbhilashSrivastava/haraka_sniffer,hiteshjoshi/my-haraka-config,DarkSorrow/Haraka,Synchro/Haraka,smfreegard/Haraka,msimerson/Haraka,hatsebutz/Haraka,typingArtist/Haraka,zombified/Haraka,haraka/Haraka,haraka/Haraka,jaredj/Haraka,niteoweb/Haraka,typingArtist/Haraka,danucalovj/Haraka,typingArtist/Haraka,DarkSorrow/Haraka,hatsebutz/Haraka,Dexus/Haraka,zombified/Haraka,jjz/Haraka,msimerson/Haraka,MignonCornet/Haraka,MignonCornet/Haraka,fatalbanana/Haraka,jaredj/Haraka,fatalbanana/Haraka,MignonCornet/Haraka,craigslist/Haraka,baudehlo/Haraka,danucalovj/Haraka,abhas/Haraka,bsmr-x-script/Haraka,abhas/Haraka,fatalbanana/Haraka,smfreegard/Haraka,danucalovj/Haraka,smfreegard/Haraka,fatalbanana/Haraka,msimerson/Haraka,jjz/Haraka,hatsebutz/Haraka,craigslist/Haraka,AbhilashSrivastava/haraka_sniffer,smfreegard/Haraka,msimerson/Haraka,DarkSorrow/Haraka,danucalovj/Haraka,baudehlo/Haraka,slattery/Haraka,DarkSorrow/Haraka,baudehlo/Haraka,Dexus/Haraka,bsmr-x-script/Haraka,Synchro/Haraka,craigslist/Haraka,hiteshjoshi/my-haraka-config,Dexus/Haraka,haraka/Haraka,slattery/Haraka,jjz/Haraka,zombified/Haraka,Synchro/Haraka,jaredj/Haraka,slattery/Haraka,bsmr-x-script/Haraka,AbhilashSrivastava/haraka_sniffer,Synchro/Haraka,bsmr-x-script/Haraka,typingArtist/Haraka,jaredj/Haraka,niteoweb/Haraka,MignonCornet/Haraka,niteoweb/Haraka,Dexus/Haraka,hatsebutz/Haraka,baudehlo/Haraka,craigslist/Haraka,haraka/Haraka,AbhilashSrivastava/haraka_sniffer