Add explicit reference to health.*

Health indicator configuration keys have moved from the health.* to the
management.health.* namespace. This commit adds an explicit reference
to the previous location.

See gh-2128

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -438,7 +438,7 @@ content into your application; rather pick only the properties that you need.
 	endpoints.trace.sensitive=true
 	endpoints.trace.enabled=true
 
-	# HEALTH INDICATORS
+	# HEALTH INDICATORS (previously health.*)
 	management.health.db.enabled=true
 	management.health.diskspace.enabled=true
     management.health.mongo.enabled=true
@@ -447,7 +447,7 @@ content into your application; rather pick only the properties that you need.
     management.health.solr.enabled=true
 	management.health.diskspace.path=.
 	management.health.diskspace.threshold=10485760
-	management.health.status.order: DOWN, OUT_OF_SERVICE, UNKNOWN, UP
+	management.health.status.order=DOWN, OUT_OF_SERVICE, UNKNOWN, UP
 
 	# MVC ONLY ENDPOINTS
 	endpoints.jolokia.path=jolokia