[code-reflection] Integrated: Derived Vector ops were shadowing fields in the base class

[Gary Frost]

Whilst refatcoring VectorOp class hierarchy I noticed we were shadowing base class variables. 

This PR addresses that.

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Commit messages:
 - Derived Vector ops were shadowing fields in the base class

Changes: https://git.openjdk.org/babylon/pull/832/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=832&range=00
  Stats: 33 lines in 1 file changed: 1 ins; 6 del; 26 mod
  Patch: https://git.openjdk.org/babylon/pull/832.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/832/head:pull/832

PR: https://git.openjdk.org/babylon/pull/832