RFR (XS) JDK-8051002: Incorrectly merged share/vm/classfile/classFileParser.cpp was pushed to 8u20

[Lois Foltan]

Hi Everyone,

Please review the following fix targeted specifically for 8u.

Webrev:
     http://cr.openjdk.java.net/~lfoltan/bug_jdk8051002/

Bug: Incorrectly merged share/vm/classfile/classFileParser.cpp was 
pushed to 8u20
     https://bugs.openjdk.java.net/browse/JDK-8051002

Summary of fix:
Incorrect JDK 8u merge of classfile/classFileParser.cpp resulted in a 
duplicate call to check the attribute_byte_length within 
ClassFileParser::parse_classfile_bootstrap_methods_attribute().  The 
first call did not reflect the fixed condition check and resulted in the 
failure of 
test/runtime/classFileParserBug/TestEmptyBootstrapMethodsAttr.java. This 
change fixes the condition check and removes the duplicate call to 
guarantee_property.

Testing:
     vm.quick.testlist, Hotspot's full jtreg tests

Thanks,
Lois