See gh-20523

* pr/20604:
  Polish BindableTests

Closes gh-20604

See gh-20604

This commit upgrades the algorithm when trailing slash are to be
ignored. Previously a root URI (i.e. "/") would result to to empty
string which is an issue for monitoring system that requires tag values
to be non empty. If the URI is a single character, the trailing is not
applied and "/" is left as is.

Closes gh-20536

Closes gh-20578

Closes gh-20589

* gh-20583:
  Link to correct factory in TomcatReactiveWebServerFactory's javadoc

Closes gh-20583

See gh-20583

Closes gh-20587

* gh-20577:
  Only suggest Ubuntu versions available in the Docker registry

Closes gh-20577

See gh-20577

See gh-20567

This reverts commit d25286c5

Closes gh-20566

See gh-20576

Closes gh-20576

See gh-20576

Closes gh-20575

See gh-20574

See gh-20573

See gh-20571

See gh-20569

Closes gh-20567

* pr/20566:
  Upgrade CI images to Ubuntu Bionic 20200311

Closes gh-20566

See gh-20566

* gh-20323:
  Fix recommended task dependency configuration

Closes gh-20323

`compileJava.dependsOn(processResources)` is not enough to ensure the
correct behavior. Using `dependsOn` only affects the execution order
(`processResources` before `compileJava`) but not the up-to-date check
of `compileJava`. After modifying
`META-INF/additional-spring-configuration-metadata.json`, the
`processResouces` task will considered out-of-date and will be
re-executed, but after that `compileJava` will still be considered
up-to-date which causes the changes not to be merged into
`META-INF/spring-configuration-metadata.json`

With this change the up-do-date check of `compileJava` is affected,
too. Therefore, it will correctly re-execute the
configuration-processor when
`META-INF/additional-spring-configuration-metadata.json` was changed.

See gh-20323

* pr/20541:
  Use @Configuration(proxyBeanMethods=false) wherever possible

Closes gh-20541

See gh-20541

Closes gh-20543

Fixes gh-20531

Previously, DevToolsDataSourceCondition called
getBeanNamesForType(Class) which could trigger unwanted initialization
of lazy init singletons and objects created by FactoryBeans.

This commit updates DevToolsDataSourceCondition to prohibit eager
init when getting the names of the beans of a particular type.

Fixes gh-20430

Closes gh-20501

Previously, DependencyCustomizer's ifAllResourcesPresent method
would return a customizer that added modules if any of the resources
were present. This commit corrects this behaviours so that modules are
only added if all resources are present.

Fixes gh-20418

Closes gh-20499

TomcatReactiveWebServerFactory's getTomcatWebServer is described as
being a hook point the can be overrideden to return a different
TomcatWebServer or to apply additional processing to the Tomcat
server. Previously, this did not work as the method was not called
to create the TomcatWebServer instance. Instead, TomcatWebServer was
instantiated and returned directly.

This commit updates TomcatReactiveWebServerFactory to call
getTomcatWebServer to create the TomcatWebServer instance. A test
has also been added to verify that the method is now used.

Fixes gh-20386

* gh-20436:
  Update versiion of git-properties plugin shown in the docs

Closes gh-20436

See gh-20436

Closes gh-20432

This reverts commit 6828a15d.
The commit has been reverted as it breaks backwards compatiblity.

Fixes gh-20343