RFR: 8032010: Attempt to resolve abstract method in concrete class fails with AbstractMethodError

[Calvin Cheung]

This change, by removing a check in LinkResolver::resolve_method(), is 
to conform with the recent change in JVMS-8 [1].
The following check during method resolution is removed:
JVMS-5.4.3.3. Method Resolution
"If method lookup succeeds and the method is abstract, but C is not 
abstract, method resolution throws an AbstractMethodError."

bug: https://bugs.openjdk.java.net/browse/JDK-8032010

webrev: http://cr.openjdk.java.net/~ccheung/8032010/webrev/

tests: (on linux-x64)
     vm.quick
     jck vm and lang
     jtreg on java/util/stream and the new testcase
     defmeth
     jprt

thanks,
Calvin

[1] http://cr.openjdk.java.net/~dlsmith/jsr335-0.9.1.html#J