Wrong frequency and delta_time computation in reconnect
Hi,
in both RTDEControl and RTDEReceveive, for the reconnect method, the frequency and delta_time are computed without taking in account the constructor parameter.
These lines should be removed and used the previous computed ones in the constructor
```cpp
frequency_ = 125;
// If e-Series Robot set frequency to 500Hz
if (versions_.major > CB3_MAJOR_VERSION)
frequency_ = 500;
// Set delta time to be used by receiveCallback
delta_time_ = 1 / frequency_;
```
issue