RFR: JDK-8286615: Small refactor to SerializedLambda [v2]

[Joe Darcy]

> Noticed by inspection during a CSR review, small refactoring to use a message-cause exception constructor when one is available.
> 
> Will update the copyright before a push.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright year.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8670/files
  - new: https://git.openjdk.java.net/jdk/pull/8670/files/82d7ab2c..6b15c809

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8670&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8670&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8670.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8670/head:pull/8670

PR: https://git.openjdk.java.net/jdk/pull/8670