RFR: 8361894: sun/security/krb5/config/native/TestDynamicStore.java ensure that the test is run with sudo [v2]

[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

Mikhail Yankelevich has updated the pull request incrementally with one additional commit since the last revision:

  checking for root user automatically

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/26293/files
  - new: https://git.openjdk.org/jdk/pull/26293/files/a12d0fd8..55cfea34

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26293&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26293&range=00-01

  Stats: 10 lines in 1 file changed: 3 ins; 0 del; 7 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