RFR #2 (S) CR 8015270: @Contended: fix multiple issues in the layout code

[Aleksey Shipilev]

Hi,

Here's the merged changeset:
  http://cr.openjdk.java.net/~shade/8015270/webrev.01/

Summary:
 - has_nonstatic_fields bug fixed
 - oop_map overrun is fixed
 - parsed_annotations->in_contended() cleaned up
 - asserts added to cover the regression tests

Testing:
 - all HS regression tests
     (have a few environmental failures, but nothing new)
 - full JPRT cycle against hotspot-rt
     (passes OK)
 - vm.quick.testlist (Solaris, Linux, Mac OS X, Windows)
     (no new failures)
 - vm.runtime.testlist (Solaris, Linux, Windows)
     (no new failures)

Thanks to Igor Ignatyev for helping running those tests without getting
any environmental failures.

-Aleksey.