* Removed MockBinderRegistryConfiguration
* Move necessary beans from `BindingServiceConfiguration` which is now auto configurable into
`BinderFactoryConfiguration` that is invoked by `EnableBinding` in order to avoid certain
cyclic dependency issues. The beans moved are binding target factories of type
`MessageSourceBindingTargetFactory` and `SubscribableChannelBindingTargetFactory` and their dependencies.
As a side effect, `ContentTypeConfiguration` is also brought back at the `EnableBinding` level through
`BinderFactoryConfiguration`.
* Restore `ServerController` bean in SchemaServerConfiguation as the removal of it
earlier introduced some connectivity issues with the schema registry server.
* Update copyrights
* Instead of redefining `BinderTypeRegistry` as a bean in several tests, properly use spring.binders
to define mock binders and then choose a default binder in tests in case of multiple binders in
same spring.binders file.
* Remove `BindingServiceConfiguration` in `EnableBinding` and introduce it as a proper
Spring Boot autoconfiguration class. Added `BindingServiceConfiguration` to spring.factories.
* Move `BinderFactory` bean into `BindingServiceConfiguration` and add `ConditionalOnMissingBean`
on it so that downstream users can define new `BinderFactory` beans as part of autoconfiguration.
* Remove `ConditionalOnMissingBean` from the `BinderTypeRegistry` bean in `BinderFactoryConfiguration`
as we don't expect this bean to be overridden.
* Remove previously added property `spring.main.allow-bean-definition-overriding` in several tests.
* Since web/actuator is optional now, remove unncecessarily setting server.port to `0` in tests
* Ensure that `BindersHealthIndicatorAutoConfiguration` is autoconfigured after `BindingServiceConfiguration`
so that it has a `BinderFactory` available.
* Remove redefining `ServerController` bean in `SchemaServerConfiguration` as this is already created through
component scanning and causing the bean overriding exceptions.
* Tests cleanup and polishing.
Resolves#1429, #1430
