RFR: 8138588: VerifyMergedCPBytecodes option cleanup needed

[Coleen Phillimore]

This option has been removed in favor of always verifying the bytecodes in debug mode.  Tested with tier1-3.

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Commit messages:
 - Fix test using option.
 - 8138588: VerifyMergedCPBytecodes option cleanup needed

Changes: https://git.openjdk.java.net/jdk/pull/1137/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1137&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8138588
  Stats: 9 lines in 4 files changed: 3 ins; 5 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1137.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1137/head:pull/1137

PR: https://git.openjdk.java.net/jdk/pull/1137