marked GetHighVoltageSlewRate as unsupproted

src/AGIPDCtrlInterface.cpp

@@ -173,7 +173,8 @@ namespace AGIPDCtrlNS
     {
         LOG_TRACE(__FUNCTION__);
 
-        return m_communication->GetHighVoltageSlewRate(hv_slewrate);
+        //return m_communication->GetHighVoltageSlewRate(hv_slewrate);
+        return UC;
     }
     
     RESPONSE AGIPDCtrlInterface::ASICPowerUP(int8 asic_mask)

src/AGIPDCtrlInterface.h

@@ -172,6 +172,7 @@ namespace AGIPDCtrlNS
 
         /**
          *  \brief get high voltage slew rate
+         *         this command is currently not supported
          *  \param hv_slewrate high voltage slew rate
          *  \return response of command \see AGIPDCtrlNS::RESPONSE
          */