RFR[15] 8248505: Unexpected NoSuchAlgorithmException when using secure random impl from BCFIPS provider

[Valerie Peng]

Hi Max and Sean,

Can you help reviewing this fix for JDK-8248505? This is the followup 
fix for JDK-8246613 "Choose the default SecureRandom algo based on 
registration ordering" which you reviewed earlier. Based on the 
feedback, BCFIPS provider overrides putService/getService() calls which 
does not work well with the fix for JDK-8246613. Thus, I adapted to 
store the SecureRandom algorithm names internally and then return the 
result from getService(...) when 
Provider.getDefaultSecureRandomService() is called. Updated the 
regression test to include a custom provider which simulates the BCFIPS 
provider behavior.

Bug: https://bugs.openjdk.java.net/browse/JDK-8248505

Webrev: http://cr.openjdk.java.net/~valeriep/8248505/webrev.00/

Thanks,
Valerie