Configuration properties change between `2.2.0.M5` and `2.2.0.M6`

.Deprecated keys in `2.2.0.M6`
|======================
|Key  |Replacement |Reason
|`management.health.status.http-mapping` |`management.endpoint.health.status.http-mapping` |
|`management.health.status.order` |`management.endpoint.health.status.order` |
|`spring.rabbitmq.publisher-confirms` |`spring.rabbitmq.publisher-confirm-type` |replaced to support additional confirm types
|======================

.New keys in `2.2.0.M6`
|======================
|Key  |Default value |Description
|`management.endpoint.health.group` | |Health endpoint groups.
|`management.endpoint.health.status.http-mapping` | |Mapping of health statuses to HTTP status codes.
|`management.endpoint.health.status.order` |`DOWN,OUT_OF_SERVICE,UP,UNKNOWN` |Comma-separated list of health statuses in order of severity.
|`management.health.ping.enabled` |`true` |Whether to enable ping health check.
|`server.jetty.idle-timeout` |`60000` |Maximum thread idle time.
|`server.jetty.max-threads` |`200` |Maximum number of threads.
|`server.jetty.min-threads` |`8` |Minimum number of threads.
|`spring.flyway.oracle-sqlplus-warn` | |Whether to issue a warning rather than an error when a not-yet-supported Oracle SQL*Plus statement is encountered.
|`spring.flyway.tablespace` | |Tablespace in which the schema history table is created.
|`spring.jms.listener.receive-timeout` |`1s` |Timeout to use for receive calls.
|`spring.rabbitmq.publisher-confirm-type` | |Type of publisher confirms to use.
|`spring.session.jdbc.flush-mode` | |Sessions flush mode.
|======================

.Removed keys in `2.2.0.M6`
|======================
|Key  |Replacement |Reason
|`spring.mvc.favicon.enabled` |`true` |Whether to enable resolution of favicon.ico.
|======================
