RFR: 8259451: Zero: skip serviceability/sa tests, set vm.hasSA to false

[Aleksey Shipilev]

Zero does not build SA (see make/autoconf/jdk-options.m4), yet the serviceability/sa tests do not know about this, because vm.hasSA is still "true" for Zero. This makes Serviceability test fail for no good reason. The tests should be skipped for Zero.

Additional testing:
 - [x] Linux x86_64 Zero `serviceability/sa` tests (now skipped)
 - [x] Linux x86_64 Server `serviceability/sa` tests (still run)

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Commit messages:
 - 8259451: Zero: skip serviceability/sa tests, set vm.hasSA to false

Changes: https://git.openjdk.java.net/jdk/pull/1999/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1999&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259451
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1999.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1999/head:pull/1999

PR: https://git.openjdk.java.net/jdk/pull/1999