Fixed SendMailJobTest to be .NET 4 compliant
Fixed SendMailJobTest to be .NET 4 compliant

sean-gilliam/quartznet,andyshao/quartznet,quartznet/quartznet,AlonAmsalem/quartznet,neuronesb/quartznet,AndreGleichner/quartznet,RafalSladek/quartznet,zhangjunhao/quartznet,sean-gilliam/quartznet,huoxudong125/quartznet,sean-gilliam/quartznet,xlgwr/quartznet,sean-gilliam/quartznet,quartznet/quartznet,quartznet/quartznet,quartznet/quartznet,quartznet/quartznet,sean-gilliam/quartznet