Update JMS listener concurrency configuration to set the same minimum
and maximum number of consumers when users specify only the minimum
using `spring.jms.listener.concurrency` property.
Prior to this commit, when using `spring.jms.listener.concurrency` to
set the minimum number of consumers without also specifying
`spring.jms.listener.max-concurrency` would result in effective
concurrency where the actual minimum number of consumers is always 1,
while the maximum number of consumers is the value of
`spring.jms.listener.concurrency`.
See gh-37180
366607f517