KAFKA-13698; KRaft authorizer should use host address instead of name

[hachikuji]

Use InetAddress.getHostAddress in StandardAuthorizer instead of InetAddress.getHostName.

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[hachikuji]

New integration test is not working on jenkins. I was afraid of that. I'll have to see if there's a better approach.

[cmccabe]

LGTM

[cmccabe]

@hachikuji : looks like AuthorizerIntegrationTest#testHostAddressBasedAcls needs to be fixed.

[cmccabe]

[2022-02-25T22:07:29.188Z] AuthorizerIntegrationTest > testHostAddressBasedAcls(String) > kafka.api.AuthorizerIntegrationTest.testHostAddressBasedAcls(String)[2] FAILED
[2022-02-25T22:07:29.188Z]     org.opentest4j.AssertionFailedError: expected: <NONE> but was: <TOPIC_AUTHORIZATION_FAILED>
[2022-02-25T22:07:29.188Z]         at app//org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
[2022-02-25T22:07:29.188Z]         at app//org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
[2022-02-25T22:07:29.188Z]         at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:182)
[2022-02-25T22:07:29.188Z]         at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:177)
[2022-02-25T22:07:29.188Z]         at app//org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:1141)
[2022-02-25T22:07:29.188Z]         at app//kafka.api.AuthorizerIntegrationTest.testHostAddressBasedAcls(AuthorizerIntegrationTest.scala:2434)