RFR(S): 8245321: refactor the redefine check that an attribute consisting of a list of classes has not changed

[serguei.spit...@oracle.com]

Please, review a fix for:
  https://bugs.openjdk.java.net/browse/JDK-8245321

Webrev:
  http://cr.openjdk.java.net/~sspitsyn/webrevs/2020/jvmti-redef-refact.1/


Summary:
  The jvmtiRedefineClasses.cpp functions check_nest_attributes and
  check_permitted_subclasses_attribute have significant common part.
  This fix is a refactoring which implements this common part into
  the function check_attribute_arrays. And this function is used in
  both check_nest_attributes and check_permitted_subclasses_attribute.

  The check_record_attributes was initially considered to be included
  into this refactoring. However, it has many differences in layout.
  I've decided, it is not worth to introduce more complexity into this
  refactoring in order to support this function as well. But, please.
  let me know if this function refactoring is still desirable.

Testing:
  Local test runs with the RedefineNestmateAttr and RedefinePermittedSubclassesAttr
  tests on a Linux server are passed.
  In progress: submit mach5 jobs with the same Nestmates and PermittedSubclasses tests.

Thanks,
Serguei