Drop deprecated spring.version pom property in favor of spring-framework.version

[gauravbhtngr]

Creating this pr (for #17037) to help removing deprecated pom property spring.version

[mbhave]

Since there were a lot of usages of spring.version which hadn't been changed to spring-framework.version, we might need to split this PR and merge the usages and deprecate spring.version at a later time.

[gauravbhtngr]

Hey @mbhave Thanks for the reply
I see spring-framework-version itself using spring.version
<spring-framework.version>${spring.version}</spring-framework.version>
Do you think it still will cause the issue ?

How do you want me to split the pr ? leave the usages changes and do not remove spring.version with this pr, spring.version is already deprecated

[mbhave]

@wilkinsona pointed out that most usages are only in integration tests so we can merge this as is.

[gauravbhtngr]

Thanks

[gauravbhtngr]

Resolved the conflict and rebased

[philwebb]

Thanks very much @gauravbhtngr, this change has now been merged into master.