RFR: 8281376: Consider polymorphic methods when looking for overrides [v2]

[Pavel Rappo]

> When looking for an overridden method, javadoc treated generic method candidates differently from those nongeneric.
> 
> - The new tests fail without the fix and pass with the fix.
> - JDK API Documentation built before and after are identical.

Pavel Rappo has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into 8281376
 - Initial commit

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7427/files
  - new: https://git.openjdk.java.net/jdk/pull/7427/files/ca36a23a..1615feca

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7427&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7427&range=00-01

  Stats: 21210 lines in 565 files changed: 14747 ins; 3673 del; 2790 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7427.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7427/head:pull/7427

PR: https://git.openjdk.java.net/jdk/pull/7427