[jdk13u-dev] RFR: 8264821: DirectIOTest fails on a system with large block size

[Sergey Nazarkin]

Please review the backport of the fix for 8264821.  The test failed on FS with rw block larger than 4k.  The fix doesn't apply cleanly due to missed  "8244224: Implementation of JEP 381: Remove the Solaris and SPARC Ports".  
Changes were made manually 
- copyright year
- isDirectIOSupportedByFS remains in the code 

Related JDK-8265231 is not necessary since public method is not removed.

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Commit messages:
 - Backport 7e4cd480206891550828d1fdfebae57ecc19ed37

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/193/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=193&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264821
  Stats: 25 lines in 1 file changed: 8 ins; 0 del; 17 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/193.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/193/head:pull/193

PR: https://git.openjdk.java.net/jdk13u-dev/pull/193