Implemented changing speed on EL734

Added a test IOCs for EL734

sinqEPICSApp/Db/basic_asyn_motor.db

@@ -4,6 +4,7 @@ record(motor,"$(P)$(M)")
 	field(DTYP,"$(DTYP)")
 	field(DIR,"$(DIR)")
 	field(VELO,"$(VELO)")
+	field(VMAX,"$(VMAX=0)")
 	field(VBAS,"$(VBAS)")
 	field(ACCL,"$(ACCL)")
 	field(BDST,"$(BDST)")

sinqEPICSApp/src/EL734Driver.cpp

@@ -270,6 +270,12 @@ asynStatus EL734Axis::move(double position, int relative, double minVelocity, do
   
   errlogPrintf("minVelocity = %f, maxVelocity = %f\n", minVelocity, maxVelocity);
 
+  /*
+   * set speed
+   */
+  sprintf(command, "J %d %d", axisNo_, (int)maxVelocity);
+  status = pC_->transactController(axisNo_, command, reply);
+
   if (relative) {
     position += this->position;
   }