fixing regression tests related to signatures with null restricted elements
------------- Commit messages: - other tests - Merge branch 'bworld' into fix.NullabilitySignatureAttrTests - additional changes - Merge branch 'bworld' into fix.NullabilitySignatureAttrTests - fix test NullabilitySignatureAttrTests.java Changes: https://git.openjdk.org/valhalla/pull/1887/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1887&range=00 Stats: 279 lines in 1 file changed: 3 ins; 237 del; 39 mod Patch: https://git.openjdk.org/valhalla/pull/1887.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1887/head:pull/1887 PR: https://git.openjdk.org/valhalla/pull/1887
