Update all tests to use JUnit 5

[felixbarny]

Now that testcontains supports JUnit 5, we should be able to update all remaining JUnit 4 tests to 5. The only thing which might be in the way that there is currently no way of having class-level parameters. But that is on JUnit's roadmap

Checklist

• apm-agent-core

apm-agent-plugins/

• apm-apache-httpclient/apm-apache-httpclient3-plugin
• apm-apache-httpclient/apm-apache-httpclient4-plugin
• apm-api-plugin
• apm-ecs-logging-plugin
• apm-es-restclient-plugin/apm-es-api-client-test
• apm-es-restclient-plugin/apm-es-restclient-plugin-5_6
• apm-es-restclient-plugin/apm-es-restclient-plugin-6_4
• apm-es-restclient-plugin/apm-es-restclient-plugin-7_x
• apm-finagle-httpclient-plugin
• apm-httpclient-core
• apm-java-concurrent-plugin
• apm-jaxrs-plugin
• apm-jaxrs-plugin-jakartaee-test
• apm-jdbc-plugin
• apm-jms-plugin/apm-jms-plugin-base
• apm-jms-plugin/apm-jms-spring-plugin
• apm-kafka-plugin/apm-kafka-base-plugin
• apm-kafka-plugin/apm-kafka-headers-plugin
• apm-kafka-plugin/apm-kafka-spring-plugin
• apm-logging-plugin/apm-log4j2-plugin
• apm-micrometer-plugin
• apm-mongodb/apm-mongodb3-plugin
• apm-mongodb/apm-mongodb4-plugin
• apm-mongodb/apm-mongodb-common
• apm-okhttp-test
• apm-opentelemetry/apm-opentelemetry-plugin
• apm-opentelemetry/apm-opentelemetry-test
• apm-rabbitmq/apm-rabbitmq-spring
• apm-redis-plugin/apm-lettuce-3-tests
• apm-redis-plugin/apm-lettuce-plugin
• apm-spring-resttemplate/apm-spring-resttemplate-plugin
• apm-spring-webmvc-plugin
• apm-urlconnection-plugin
• apm-vertx/apm-vertx-common

integration-tests/

• application-server-integration-tests
• spring-boot-1-5
• spring-boot-2/spring-boot-2-base

[yatsenko-julia]

I’ll work on this one.

[videnkz]

reference: junit-team/junit5#878