JAVA-3030: Update "Spring Profiles" article

spring-core-2/src/main/resources/application.properties

@@ -1 +1,28 @@
 spring.profiles.active=@spring.profiles.active@
+
+my.prop=used-always-in-all-profiles
+
+#---
+spring.config.activate.on-profile=dev
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.url=jdbc:mysql://localhost:3306/db
+spring.datasource.username=root
+spring.datasource.password=root
+
+#---
+spring.config.activate.on-profile=production
+spring.datasource.driver-class-name=org.h2.Driver
+spring.datasource.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1
+spring.datasource.username=sa
+spring.datasource.password=sa
+
+#---
+spring.profiles.group.production=proddb,prodquartz
+
+#---
+spring.config.activate.on-profile=proddb
+db=url_to_production_db
+
+#---
+spring.config.activate.on-profile=prodquartz
+quartz=url_to_quartz_scheduler