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Jacobian transpose product zero out quadratic contribution #641

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@blegat

ReverseAD zero out the Jtv vector in
https://github.com/jump-dev/MathOptInterface.jl/blob/85afcdbbd30bdb1cdc466bf6d75bcafd49ad1def/src/Nonlinear/ReverseAD/mathoptinterface_api.jl#L266
but it is called after the contribution of the quadratic part has been written

fill!(Jtv, 0.0)
offset = length(model.qp_data)
v_qp = view(v, 1:offset)
# Evaluate jtprod for linear-quadratic part of the model.
MOI.eval_constraint_jacobian_transpose_product(model.qp_data, Jtv, x, v_qp)
# Evaluate jtprod for all VectorNonlinearOracle.
for (f, s) in model.vector_nonlinear_oracle_constraints
_eval_constraint_transpose_jacobian_product(Jtv, x, offset, f, s, v)
offset += s.set.output_dimension
end
# Evaluate jtprod for remaining nonlinear expressions.
v_nlp = view(v, (offset+1):length(v))
MOI.eval_constraint_jacobian_transpose_product(model.nlp_data.evaluator, Jtv, x, v_nlp)
return

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