[jdk8u-dev] RFR: 8299548: Fix hotspot/test/runtime/Metaspace/MaxMetaspaceSizeTest.java in 8u

[zzambers]

It was discovered [1] that following test is always skipped in 8u:
`hotspot/test/runtime/Metaspace/MaxMetaspaceSizeTest.java`

Test comes from JDK-8087291 [2] backport. Test is for 64-bit JDK only and uses following jtreg tag to test that:
`@requires vm.bits == "64"`

However `vm.bits` is not supported on 8u, where condition evaluates as always false, which results in test being skipped on all systems.

Fix:
Fixed by doing explicit check in test instead of using jtreg tag.

Testing:
Tested using github actions as test is part of hotspot/tier1.

[1] https://github.com/openjdk/jdk8u-dev/pull/182#discussion_r1024395333
[2] https://bugs.openjdk.org/browse/JDK-8087291

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Commit messages:
 - Fixed MaxMetaspaceSizeTest

Changes: https://git.openjdk.org/jdk8u-dev/pull/222/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=222&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299548
  Stats: 6 lines in 1 file changed: 5 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/222.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/222/head:pull/222

PR: https://git.openjdk.org/jdk8u-dev/pull/222