RFR: 8219555: compiler/jvmci/compilerToVM/IsMatureTest.java fails with Unexpected isMature state for multiple times invoked method: expected false to equal true

[Igor Veresov]

Cleanup the behavior of the compilation policy with -Xcomp.

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Commit messages:
 - Cleanup behavior of compilation policy with -Xcomp

Changes: https://git.openjdk.java.net/jdk/pull/2864/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2864&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8219555
  Stats: 63 lines in 9 files changed: 16 ins; 27 del; 20 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2864.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2864/head:pull/2864

PR: https://git.openjdk.java.net/jdk/pull/2864