NoSuchBeanDefinitionException with a custom Flyway bean that is not named flyway

[wilkinsona]

This is a specific example of the problem described in #17888.

 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactoryBean' defined in org.springframework.boot.autoconfigure.flyway.FlywayAutoConfigurationTests$CustomFlywayWithJpaConfiguration: 'entityManagerFactoryBean' depends on missing bean 'flyway'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'flyway' available
 	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
 	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105)
 	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
 	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.configureContext(AbstractApplicationContextRunner.java:330)
 	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.createAndLoadContext(AbstractApplicationContextRunner.java:307)
 	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.getContextOrStartupFailure(AssertProviderApplicationContextInvocationHandler.java:61)
 	at org.springframework.boot.test.context.assertj.AssertProviderApplicationContextInvocationHandler.<init>(AssertProviderApplicationContextInvocationHandler.java:48)
 	at org.springframework.boot.test.context.assertj.ApplicationContextAssertProvider.get(ApplicationContextAssertProvider.java:112)
 	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.createAssertableContext(AbstractApplicationContextRunner.java:301)
 	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.lambda$1(AbstractApplicationContextRunner.java:270)
 	at org.springframework.boot.test.util.TestPropertyValues.applyToSystemProperties(TestPropertyValues.java:129)
 	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.lambda$0(AbstractApplicationContextRunner.java:269)
 	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.withContextClassLoader(AbstractApplicationContextRunner.java:281)
 	at org.springframework.boot.test.context.runner.AbstractApplicationContextRunner.run(AbstractApplicationContextRunner.java:268)
 	at org.springframework.boot.autoconfigure.flyway.FlywayAutoConfigurationTests.customFlywayWithJpa(FlywayAutoConfigurationTests.java:269)
 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 	at java.lang.reflect.Method.invoke(Method.java:498)
 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
 	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
 	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)
 Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'flyway' available
 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:771)
 	at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1221)
 	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:294)
 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
 	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:307)
 	... 39 more