RFR: 7903880: Check if JCov needs an update for security manager removal

[Leonid Kuskov]

[7903880](https://bugs.openjdk.org/browse/CODETOOLS-7903880)
The fix removes leftovers from the security API (java.security.AccessController, java.security.PrivilegedAction) that work in conjunction with the Security Manager and are subject to removal in a future version.

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Commit messages:
 - 7903880: Check if JCov needs an update for security manager removal

Changes: https://git.openjdk.org/jcov/pull/57/files
  Webrev: https://webrevs.openjdk.org/?repo=jcov&pr=57&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903880
  Stats: 27 lines in 4 files changed: 0 ins; 14 del; 13 mod
  Patch: https://git.openjdk.org/jcov/pull/57.diff
  Fetch: git fetch https://git.openjdk.org/jcov.git pull/57/head:pull/57

PR: https://git.openjdk.org/jcov/pull/57