Novelec part updated

- MCCE2 (Novelec part) : methods to change the active channel to communicate with.

- DDC status show only errors if any
- added command to get DDC model configuration

- SRQ management changed :
* ReadStatusByteRegister method added
* IsSrqLineUP added

- command abort added for SCPI Keithleys

- command abort added for SCPI Keithleys

- minor change for integration time

- Integration Mode available for DDC/SCPI devices
- tests done with a K617 (DDC) and a K6485 (SCPI)

- integration mode OK (tests done with K_486)

- TODO: DDC/SCPI
integration time for ScanServer compatibility.
report config for all DDC
add configuration in SCPI start command

- trigger mode and buffer size management added.
- TODO: DDC/SCPI
integration time for ScanServer compatibility.
SRQ management for Keithley Integration mode

- modif done on Novelec part :
init_MCCE2() added