RFR: JDK-8284688 Minor cleanup could be done in java.security.jgss

[Mark Powers]

https://bugs.openjdk.java.net/browse/JDK-8284688

[JDK-8273046](https://bugs.openjdk.java.net/browse/JDK-8273046) is the umbrella bug for this bug. The changes were too large for a single code review, so it was decided to split into smaller chunks. This is one such chunk: 

open/src/java.security.jgss/share/classes/javax/security 
open/src/java.security.jgss/share/classes/org/ietf 
open/src/java.security.jgss/share/classes/sun/security

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Commit messages:
 - third iteration
 - Merge
 - Merge
 - Merge
 - second iteration
 - first iteration

Changes: https://git.openjdk.java.net/jdk/pull/7746/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7746&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8284688
  Stats: 1009 lines in 73 files changed: 79 ins; 222 del; 708 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7746.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7746/head:pull/7746

PR: https://git.openjdk.java.net/jdk/pull/7746