RFR: 6805: Event emission only on exceptions [v2]

[Joshua Matsuoka]

> This PR implements [JMC-6805](https://bugs.openjdk.java.net/browse/JMC-6805) allowing the agent to optionally only emit
> events when exceptions are thrown by the instrumented method. This is configurable via an added xml option that when
> set to true will only emit the event in the catch of the injected try-catch block.

Joshua Matsuoka has updated the pull request incrementally with one additional commit since the last revision:

  Fix copyright year

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Changes:
  - all: https://git.openjdk.java.net/jmc/pull/92/files
  - new: https://git.openjdk.java.net/jmc/pull/92/files/1a9c4677..25049897

Webrevs:
 - full: https://webrevs.openjdk.java.net/jmc/92/webrev.01
 - incr: https://webrevs.openjdk.java.net/jmc/92/webrev.00-01

  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jmc/pull/92.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/92/head:pull/92

PR: https://git.openjdk.java.net/jmc/pull/92