[master] RFR: SA: Remove !hasMonitor() assert in getKlass()

[Stefan Karlsson]

Small patch to fix SA testing with UCOH.

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Commit messages:
 - SA: Removing !monitor() assert in getKlass()

Changes: https://git.openjdk.org/lilliput/pull/150/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=150&range=00
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/lilliput/pull/150.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/150/head:pull/150

PR: https://git.openjdk.org/lilliput/pull/150