Fix defaults resolution when shortcut settings are passed to bunyan config

lib/config.js

@@ -31,24 +31,18 @@ nconf.defaults({
     port: 80,
     bunyan: {
       name: nconf.get('name') || 'spserver',
-      streams: [{
       stream: 'process.stdout',
-          level: 'info'
-        }
-      ]
+      level: 'info',
     },
   },
   development: {
     port: 3001,
     bunyan: {
       name: nconf.get('name') || 'spserver',
-      streams: [{
       stream: 'process.stdout',
-          level: 'debug'
-        }
-      ]
+      level: 'debug',
+    },
   },
-  }
 });
 
 module.exports = nconf;

lib/logger.js

@@ -13,7 +13,19 @@ var output;
 if (config.get('bunyan') || config.get(env + ':use_bunyan')) {
   var settings = _.cloneDeep(config.get(env + ':bunyan'));
 
-  // Stream can be specified either in settings.streams[ix] or globally in settings.stream
+  // Stream can be specified either in settings.streams[ix] or globally in settings.stream, but not
+  // both. Since the defaults specify stetings.stream, if the user specifies anything of vaulue
+  // in settings.streams, we should delete the global defaults, because bunyan gets angry if there
+  // are multiple keys
+  if (_.has(settings, 'streams')) {
+    if (settings.streams) {
+      delete settings.stream;
+      delete settings.level;
+    } else {
+      delete settings.streams;
+    }
+  }
+
   _([settings.streams, settings])
     .flatten()
     .compact()