[spring-boot-dependencies] Provide e.g. spring-boot.version for Spring Cloud

[juergenzimmermann]

The bom file spring-cloud-starter-parent is using spring-boot-starter-parent as ist parent. The latest release train of Spring Cloud is Dalston.M1 which uses version 1.5.0.RC1 of spring-boot-starter-parent: https://github.com/spring-cloud/spring-cloud-release/blob/vDalston.M1/spring-cloud-starter-parent/pom.xml#L8
When spring-boot-starter-parent has a property like spring-boot.version and all <dependency> declarations are using this property instead of a hard-coded version, then it would be possible to easily upgrade Spring Boot inside Spring Cloud.

[spencergibb]

If you use spring-cloud-dependencies rather than the parent, you can upgrade the version of Spring Boot independently.

[philwebb]

As mentioned by @spencergibb, you should use the BOM. I think if you generate your project from start.spring.io then this is what you'll get.

[philwebb]

FWIW we've discussed using a property in the past but it causes some other issues.

[wilkinsona]

See #7048