This command power cycle module and High Voltage.

Current implementation of the Hardware ROI management for
Pilatus3 is extended to Pilatus2 6M model. To restrict this
extension to the 6M model, the m_has_harware_roi flag is
initialized to true and is set to false for detector models
 which could not be tested i.e. Pilatus2 2M and 1M models.
The addition of those  excluded models would be straigh forward.

Just the extension to deal with Pilatus2 6M is not enough. We
observe that Pilatus2 6M detector goes to ERROR after sending
the setroi command. However, this return code from the camserver
looks a fake, since this was an experimental implementation
(according to Dectris) and, in fact, the roi is properly set.
The workaround implemented here ignores this string error and
sets the detector state to STANBY ONLY for Pilatus2 series,
because this behavior has been only observed for Pilatus2 6M
model using the tvx-7.3.13-121212 version.

- Pilatus3 6M take more than 3 seconds when changing exposure time and period,so increased the timout to 10
- reset acquisition image number to 1 on re-connection

otherwise  an emulated energy setting is made using gain and threshold.
This was moved from the Pilatus.py tango server plugin to here.

If DMA error is occured, state is FAULT.
In order to avoid a problem in CollectServer, if a command setImagePath() is used, state is changed to STANDBY

- Mantis 0021103 (bug associated to stop and state when DMA fault)

- Enhance open/close socket

- if UseReader = true,  use yat::DirectoryWatcher object to monitor files .cbf and increase nb_frames for each new file.
- if UseReader = false, use camserver response Exposure Succeded, and increase nb_frames directly to the nb of requested frames

- Adapt Interface::get_status) in order to differebciate FAULT from INIT
- After setThreshol resync with server

- In PilatusReader.cpp/h, a GDShare::DirectoryWatcher is used to monitor directory where files  .cbf are generated
- Enhance State

- Enhance state management
- Enhance Traces

- Add some traces

- comments

- Status NOT WORKING yet.
- NbFRames NOT WORKING yet.

- Enhance decodage of communication with the camera
- ....