RFR 6996807 : FieldReflectorKey hash code computation can be improved

[Ivan Gerasimov]

Hello!

FieldReflectorKey class contains a combined-string representation of the 
fields (their names and signatures).

This string is used for calculating the hash code and comparing two 
FieldReflectorKey objects for equality, which is expensive.

It is proposed to store the names and signatures (which are likely to be 
interned) in an array an use this array for both tasks utilizing 
Arrays.hashCode() and Arrays.equals().

BUGURL: https://bugs.openjdk.java.net/browse/JDK-6996807
WEBREV: http://cr.openjdk.java.net/~igerasim/6996807/00/webrev/

Would you please help review the fix?

-- 
With kind regards,
Ivan Gerasimov