Add maxInMemorySize property for ReactiveRestClientAutoConfiguration …

[sjlzcj]

…and add username and password in ClientConfiguration when username or password is not null

[pivotal-issuemaster]

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[sjlzcj]

Add maxInMemorySize property for ReactiveRestClientAutoConfiguration and add username and password in ClientConfiguration when username or password is not null

[wilkinsona]

We already have a proposal for making the max in-memory size configurable. It is currently scheduled for inclusion in Spring Boot 2.3.

The username and password are already applied by the existing auto-configuration:

spring-boot/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveRestClientAutoConfiguration.java

Lines 78 to 82 in 7aa5eb1

	map.from(properties.getUsername()).whenHasText().to((username) -> {
	HttpHeaders headers = new HttpHeaders();
	headers.setBasicAuth(username, properties.getPassword());
	builder.withDefaultHeaders(headers);
	});

Thanks anyway for your pull request.