Crystal structure of bis(μ2-2-chlorobenzoato-κ3O,O′:O′)-(2-chlorobenzoato-κO)-(2-chlorobenzoato-κO,O′)-bis(1,10-phenanthroline-κ2N,N′)-dicadmium(II) monohydrate, C52H36Cd2Cl4N4O10