Sort classes by name before renaming

[tefra]

Specially in netex collection it's common to have base types that have an underscore prefix or a suffix, when it's time to resolve these conflict the handler assigns auto increment suffixes by following whatever order the classes arrive in the handler.

So for example the class type ParkingSpace is renamed to ParkingSpace2 and the type _ParkingSpace to ParkingSpace1, which seems a bit unfair, so sort the classes by name before assigning new names

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #517 (5187f98) into master (1c65024) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #517   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           87        87           
  Lines         7512      7514    +2     
  Branches      1313      1312    -1     
=========================================
+ Hits          7512      7514    +2     

Impacted Files	Coverage Δ
xsdata/codegen/handlers/attribute_default_value.py	100.00% <100.00%> (ø)
xsdata/codegen/handlers/class_name_conflict.py	100.00% <100.00%> (ø)

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