MbedClient add possibility to set socket timeout in constructor

Author: pennam

libraries/SocketWrapper/src/MbedClient.h

@@ -49,6 +49,10 @@ class MbedClient : public arduino::Client {
 public:
   MbedClient();
 
+  MbedClient(unsigned long  timeout) {
+    _timeout = timeout;
+  }
+
   // Copy constructor, to be used when a Client returned by server.available()
   // needs to "survive" event if it goes out of scope
   // Sample usage: Client* new_client = new Client(existing_client)