[9] RFR 8157881: security.provider property description needs to be updated for modules

[Valerie Peng]

Sean,

Can you please help reviewing this? I suppose we don't need to file CCC 
for this, right? There is already an earlier one under 7191662 and this 
is just updating comments in java.security file.

Bug: https://bugs.openjdk.java.net/browse/JDK-8157881
Webrev: http://cr.openjdk.java.net/~valeriep/8157881/webrev.00/

Thanks,
Valerie