RFR 7004967: SecureRandom should be more explicit about threading

[Wang Weijun]

> 在 2016年11月2日，21:50，Xuelei Fan <xuelei.fan at oracle.com> 写道：
> 
> I may change "the service provider attribute" to "the service attribute".

I didn't invent that name, I remember it's named exactly like this in one of the security guides. Will check tomorrow, not near a big screen now. 

Thanks
Max