RFR: 8252845: Regressions in Sanity tests after JDK-8251032

[Alexey Ushakov]

Revert "8251032: Colors with texture background look different with Alpha Com…"

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Commit messages:
 - 8252845: Regressions in Sanity tests after JDK-8251032

Changes: https://git.openjdk.java.net/lanai/pull/90/files
 Webrev: https://webrevs.openjdk.java.net/?repo=lanai&pr=90&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8252845
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.java.net/lanai/pull/90.diff
  Fetch: git fetch https://git.openjdk.java.net/lanai pull/90/head:pull/90

PR: https://git.openjdk.java.net/lanai/pull/90