Number of licenses of type celInUseLicenseType being used
by this physical entity (represented by entPhysicalIndex)
at this time.
These licenses are obtained from the license pool represented
by the table celPoolLicenseTable. Therefore, the value of
the object celPoolLicensesInUse, corresponding to relevant
license and the vendor-specific hardware type, increases or
decreases when the value of this object increases or decreases.