RFR: 8284567: Collapse identical catch branches in java.base

[Andrey Turbanov]

Let's take advantage of Java 7 language feature - "Catching Multiple Exception Types".
It simplifies code. Reduces duplication.
Found by IntelliJ IDEA inspection Identical 'catch' branches in 'try' statement

-------------

Commit messages:
 - Merge remote-tracking branch 'origin/master' into collapse_identical_catch_java.base
 - [PATCH] Collapse identical catch branches in java.base
 - [PATCH] Collapse identical catch branches in java.base

Changes: https://git.openjdk.java.net/jdk/pull/8081/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8081&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8284567
  Stats: 106 lines in 17 files changed: 0 ins; 60 del; 46 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8081.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8081/head:pull/8081

PR: https://git.openjdk.java.net/jdk/pull/8081