RFR: 8361894: sun/security/krb5/config/native/TestDynamicStore.java ensure that the test is run with sudo

[Mikhail Yankelevich]

sun/security/krb5/config/native/TestDynamicStore.java is commonly run without sudo, which leads to the access related failure. 
Added a ui popup reminding to run the test with sudo, making instructions clearer and more noticeable

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Commit messages:
 - JDK-8361894: sun/security/krb5/config/native/TestDynamicStore.java ensure that the test is run with sudo

Changes: https://git.openjdk.org/jdk/pull/26293/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26293&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361894
  Stats: 12 lines in 1 file changed: 10 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26293.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26293/head:pull/26293

PR: https://git.openjdk.org/jdk/pull/26293