Integrated: 8310684: [lw5] adding missing ImplicitCreation and NullRestricted visitors in regression tests

[Vicente Romero]

minor fixes to couple of regression tests

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Commit messages:
 - 8310684: [lw5] adding missing ImplicitCreation and NullRestricted visitors in regression tests

Changes: https://git.openjdk.org/valhalla/pull/871/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=871&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310684
  Stats: 13 lines in 2 files changed: 12 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/871.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/871/head:pull/871

PR: https://git.openjdk.org/valhalla/pull/871