RFR:8063100:Unnecessary invalidation of global constants in Context.setGlobal

[Priya Lakshmi Muthuswamy]

Hi,

Please review JDK-8063100:Unnecessary invalidation of global constants 
in Context.setGlobal
JBS: https://bugs.openjdk.java.net/browse/JDK-8063100
webrev: http://cr.openjdk.java.net/~pmuthuswamy/8063100/webrev.00/
Thanks,
Priya