Several backends-related updates and additions

Common/Clients/SystemTerminal/src/nuraghe_commands.py

Common/Interfaces/BackendsInterface/idl/GenericBackend.idl

Common/Interfaces/BackendsInterface/idl/Sardara.idl

Common/Interfaces/BackendsInterface/idl/Skarab.idl

Common/Libraries/DiscosBackendProtocol/include/command.hpp

Common/Libraries/DiscosBackendProtocol/src/command.cpp

Common/Servers/NoiseGenerator/include/NoiseGeneratorImpl.h

Common/Servers/Sardara/include/CommandLine.h

Common/Servers/Sardara/include/SardaraImpl.h

Common/Servers/Sardara/src/CommandLine.cpp

Common/Servers/Sardara/src/SardaraImpl.cpp

Common/Servers/Scheduler/include/Core_Basic.h

Common/Servers/Scheduler/include/Core_Common.h

Common/Servers/Scheduler/src/Core.cpp

Common/Servers/Scheduler/src/Core_Basic.i

Common/Servers/Scheduler/src/Core_Common.i

Common/Servers/Scheduler/src/ScheduleExecutor.cpp

Common/Servers/Skarab/include/CommandLine.h

Common/Servers/Skarab/include/Common.h

Common/Servers/Skarab/include/SkarabImpl.h