Do not set Name attributes if unsupported

[odow]

Closes #2655

[codecov]

Codecov Report

Merging #2704 (d40d9dc) into master (118b5ac) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2704      +/-   ##
==========================================
+ Coverage   93.53%   93.54%   +0.01%     
==========================================
  Files          44       44              
  Lines        5444     5453       +9     
==========================================
+ Hits         5092     5101       +9     
  Misses        352      352              

Impacted Files	Coverage Δ
src/constraints.jl	95.40% <100.00%> (+0.12%)	⬆️
src/variables.jl	98.56% <100.00%> (+0.01%)	⬆️

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