Add config option for connection request timeout

Resolves: #148

lib/api-functions.coffee

@@ -84,7 +84,7 @@ connectionRequest = (deviceId, callback) ->
     )
 
     request.on('socket', (socket) ->
-      socket.setTimeout(2000)
+      socket.setTimeout(config.get('CONNECTION_REQUEST_TIMEOUT', deviceId))
       socket.on('timeout', () ->
         request.abort()
       )

lib/config.coffee

@@ -50,6 +50,7 @@ options = {
   GET_PARAMETER_NAMES_DEPTH_THRESHOLD : {type : 'int', default : 0},
   TASK_PARAMETERS_BATCH_SIZE : {type : 'int', default : 32},
   COOKIES_PATH : {type : 'string'},
+  CONNECTION_REQUEST_TIMEOUT : {type : 'int', default : 2000},
 
   # Libxml related configuration
   XML_PARSE_RECOVER : {type : 'bool'},