Fix printing of supplemental attributes

The default Base.show method was printing circular references to
objects internal to supplemental attributes. This solution uses the same
method as is used for components.

src/utils/print.jl

@@ -113,7 +113,7 @@ function Base.show(io::IO, ::MIME"text/plain", system_units::SystemUnitsSettings
     end
 end
 
-function Base.show(io::IO, ::MIME"text/plain", ist::InfrastructureSystemsComponent)
+function Base.show(io::IO, ::MIME"text/plain", ist::TimeSeriesOwners)
     print(io, summary(ist), ":")
     for name in fieldnames(typeof(ist))
         obj = getfield(ist, name)
@@ -131,7 +131,7 @@ function Base.show(io::IO, ::MIME"text/plain", ist::InfrastructureSystemsCompone
     print(io, "\n   ", "has_time_series", ": ", string(has_time_series(ist)))
 end
 
-function Base.show(io::IO, ist::InfrastructureSystemsComponent)
+function Base.show(io::IO, ist::TimeSeriesOwners)
     print(io, strip_module_name(typeof(ist)), "(")
     is_first = true
     for (name, field_type) in zip(fieldnames(typeof(ist)), fieldtypes(typeof(ist)))