Update lib/report-portal-client.js

Add error passing to reject in startLaunch.

Author: Elnar Khisamov

lib/report-portal-client.js

@@ -138,7 +138,7 @@ class RPClient {
                         resolve(response);
                     }, (error) => {
                         console.dir(error);
-                        reject();
+                        reject(error);
                     });
             });
         }