RFR: JDK-8278179: Enable all doclint warnings for build of java.naming

[Joe Darcy]

An exploratory build indicates that it is not necessary to disable the accessibility doclint check for the java.naming module.

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Commit messages:
 - JDK-8278179: Enable all doclint warnings for build of java.naming

Changes: https://git.openjdk.java.net/jdk/pull/6688/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6688&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278179
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6688.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6688/head:pull/6688

PR: https://git.openjdk.java.net/jdk/pull/6688