spring: Bind absolute-URI client test to an ephemeral port

[kalayciburak]

Motivation:

ArmeriaHttpExchangeAdapterTest.greetingWithAbsoluteUri binds a dedicated server to the hardcoded port 65493. When that port is already in use, the test fails with ServerPortBindException (Address already in use) instead of covering the absolute-URI path.

Modifications:

• Bind the dedicated server to an ephemeral port (http(0)).
• Resolve http://foo.com:${absoluteUri.port}/greeting through HttpServiceProxyFactory.embeddedValueResolver.
• Close the dedicated server in finally.

Result:

• Closes Test failure: com.linecorp.armeria.spring.client.ArmeriaHttpExchangeAdapterTest.greetingWithAbsoluteUri() #6705
• The absolute-URI exchange test no longer depends on a free hardcoded port.

[coderabbitai]

Caution

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[jrhee17]

👍 👍

[minwoox]

Thanks!

[github-actions]

🔍 Build Scan® (commit: a44e36e)

Job name	Status	Build Scan®
build-ubicloud-standard-16-jdk-8	✅	https://community.develocity.cloud/s/nyk7hywxmiyji
build-ubicloud-standard-16-jdk-25	❌ (failure)	https://community.develocity.cloud/s/imyskfpcprdyi
build-ubicloud-standard-16-jdk-21-snapshot-blockhound	✅	https://community.develocity.cloud/s/3zxjxrvuktekk
build-ubicloud-standard-16-jdk-17-min-java-17-coverage	✅	https://community.develocity.cloud/s/jcgfsay343y2q
build-ubicloud-standard-16-jdk-17-min-java-11	❌ (failure)	https://community.develocity.cloud/s/4asyoop4nns6y
build-ubicloud-standard-16-jdk-17-leak	✅	https://community.develocity.cloud/s/ghfb3d2gwekm2
build-ubicloud-standard-16-jdk-11	✅	https://community.develocity.cloud/s/yxhygmcfsf4t2
build-macos-latest-jdk-25	✅	https://community.develocity.cloud/s/mzkwvrnmeqqys

[ikhoon]

Thanks!