springboot Align TestRestTemplate Javadoc with documentation

Aligned TestRestTemplate Javadoc with documentation. To make it more clear that it will be autoconfigured only if SpringBoot test is running is embedded mode, eg @SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT) or @SpringBootTest(webEnvironment = WebEnvironment.DEFINED_PORT)

Documentation: https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-rest-templates-test-utility

Comment From: ahrytsiuk

Following tests failed:

:spring-boot-project:spring-boot-autoconfigure:test
    org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongoAutoConfigurationTests > defaultVersion()
    org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongoAutoConfigurationTests > randomlyAllocatedPortIsAvailableWhenCreatingMongoClient()
    org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongoAutoConfigurationTests > shutdownHookIsNotRegistered()

Looks like flakiness since my changes are not related.

How can I re-run a pipeline?

Comment From: philwebb

Since these are javadoc changes don't worry about getting CI to pass.