fix: trying build

Author: vlastahajek

src/InfluxDbClient.h

@@ -50,6 +50,7 @@ class Test;
  * Automaticaly retries failed writes during next write, if server is overloaded.
  */
 class InfluxDBClient {
+  friend class Test;
   public:
     // Creates InfluxDBClient unconfigured instance. 
     // Call to setConnectionParams is required to set up client 
@@ -221,7 +222,6 @@ class InfluxDBClient {
         virtual size_t write(uint8_t data) override;
 
     };
-  friend class Test;
     ConnectionInfo _connInfo;  
     // Cached full write url
     String _writeUrl;