Bridges throw wrong errors during modification

[odow]

Found during jump-dev/SCS.jl#219

optimizer = SCS.Optimizer()
MOI.set(optimizer, MOI.Silent(), true)
model = MOI.Bridges.full_bridge_optimizer(
    MOI.Utilities.CachingOptimizer(
        MOI.Utilities.UniversalFallback(MOI.Utilities.Model{Float64}()),
        optimizer,
    ),
    Float64,
)
julia> MOI.Test.test_modification_set_function_single_variable(model, MOI.Test.Config())
Test Failed at /Users/oscar/.julia/dev/MathOptInterface/src/Test/test_modification.jl:29
  Expression: MOI.set(model, MOI.ConstraintFunction(), c, y)
    Expected: MathOptInterface.SettingVariableIndexNotAllowed()
      Thrown: MathOptInterface.SetAttributeNotAllowed{MathOptInterface.ConstraintFunction}(MathOptInterface.ConstraintFunction(), "")
ERROR: There was an error during testing

optimizer = SCS.Optimizer()
MOI.set(optimizer, MOI.Silent(), true)
model = MOI.Bridges.full_bridge_optimizer(
    MOI.Utilities.CachingOptimizer(
        MOI.Utilities.UniversalFallback(MOI.Utilities.Model{Float64}()),
        optimizer,
    ),
    Float64,
)
julia> MOI.Test.test_objective_incorrect_modifications(model, MOI.Test.Config())
Test Failed at /Users/oscar/.julia/dev/MathOptInterface/src/Test/test_objective.jl:539
  Expression: MOI.set(model, MOI.ConstraintSet(), c, MOI.LessThan(1.0))
    Expected: ArgumentError
  No exception thrown
ERROR: There was an error during testing