RFR: CODETOOLS-7903098: CODETOOLS-7903093 breaks some `basic` tests

[Jonathan Gibbons]

Please review the fixes for a couple of broken tests, after a couple of new test cases were added to the venerable `basic` set of tests.

In the [review for CODETOOLS-7903098](https://github.com/openjdk/jtreg/commit/86d0b3b077be7e89f984a8dcd44c256393c7ec98)
see the two new test cases added for the `@clean` action: one good, one bad.

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Commit messages:
 - CODETOOLS-7903098: CODETOOLS-7903093 breaks some `basic` tests

Changes: https://git.openjdk.java.net/jtreg/pull/55/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jtreg&pr=55&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7903098
  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jtreg/pull/55.diff
  Fetch: git fetch https://git.openjdk.java.net/jtreg pull/55/head:pull/55

PR: https://git.openjdk.java.net/jtreg/pull/55