Fix flaky Athenz integration tests

[ikhoon]

Motivation:

Athenz Docker containers intermittently fail to start in our CI environment.

[Test worker] INFO tc.docker - Local Docker Compose is running command: compose up -d
[Thread-5] INFO tc.docker -  Network jedrmcc2cwgf_athenz  Creating
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zts-db-1  Creating
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zms-db-1  Creating
...
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zms-server-1  Starting
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zms-server-1  Started
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zts-db-1  Waiting
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zms-server-1  Waiting
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zts-db-1  Error
[Thread-5] INFO tc.docker -  Container jedrmcc2cwgf-zms-server-1  Healthy
[Thread-5] INFO tc.docker - dependency failed to start: container jedrmcc2cwgf-zts-db-1 is unhealthy
[Test worker] WARN com.linecorp.armeria.server.athenz.AthenzDocker - Failed to initialize Athenz Docker container
org.testcontainers.containers.ContainerLaunchException: Local Docker Compose exited abnormally with code 1 whilst running command: compose up -d
	at org.testcontainers.containers.LocalDockerCompose.invoke(LocalDockerCompose.java:119)
	at org.testcontainers.containers.ComposeDelegate.runWithCompose(ComposeDelegate.java:241)
	at org.testcontainers.containers.ComposeDelegate.createServices(ComposeDelegate.java:163)
	at org.testcontainers.containers.ComposeContainer.start(ComposeContainer.java:133)
	at com.linecorp.armeria.server.athenz.AthenzDocker.initialize(AthenzDocker.java:105)
	at example.armeria.athenz.AthenzTest$1.configure(AthenzTest.java:44)
	at com.linecorp.armeria.testing.junit5.server.ServerExtension$1.configure(ServerExtension.java:72)

Modifications:

• Increase the health check timeout and retry count for Athenz databases.
• Automatically retry up to 5 times when Docker startup fails.

Result:

Hopefully fix the flakiness

[github-actions]

🔍 Build Scan® (commit: 4ff3f84)

Job name	Status	Build Scan®
build-ubicloud-standard-16-jdk-8	✅	https://ge.armeria.dev/s/rbyflmm5tmob4
build-ubicloud-standard-16-jdk-21-snapshot-blockhound	✅	https://ge.armeria.dev/s/3owjwg6s4re32
build-ubicloud-standard-16-jdk-17-min-java-17-coverage	✅	https://ge.armeria.dev/s/77e2p6une4re6
build-ubicloud-standard-16-jdk-17-min-java-11	✅	https://ge.armeria.dev/s/dlu6rjbceryvu
build-ubicloud-standard-16-jdk-17-leak	✅	https://ge.armeria.dev/s/gita3mi2u6uy4
build-ubicloud-standard-16-jdk-11	❌ (failure)	https://ge.armeria.dev/s/3jk6n43rz4zay
build-macos-latest-jdk-21	✅	https://ge.armeria.dev/s/wlpwz2ndpg5s6