Merge branch '2.2.x' into 2.3.x

Closes gh-22626

Author: snicoll

spring-boot-project/spring-boot-actuator/build.gradle

@@ -12,6 +12,7 @@ dependencies {
 	api(project(":spring-boot-project:spring-boot"))
 
 	optional("com.fasterxml.jackson.core:jackson-databind")
+	optional("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
 	optional("com.github.ben-manes.caffeine:caffeine")
 	optional("com.hazelcast:hazelcast")
 	optional("com.hazelcast:hazelcast-spring")