Remove the hard-coded versions for Spring Integration in pom.xml
Remove the hard-coded versions for Spring Integration in pom.xml

Spring Cloud Stream already gets it through Spring Boot

Fixes #1103
Fixes #1104

spring-cloud/spring-cloud-stream,dturanski/spring-cloud-stream,spring-cloud/spring-cloud-stream,viniciusccarvalho/spring-cloud-stream,garyrussell/spring-cloud-stream,viniciusccarvalho/spring-cloud-stream,viniciusccarvalho/spring-cloud-stream,ilayaperumalg/spring-cloud-stream,ilayaperumalg/spring-cloud-stream,dturanski/spring-cloud-stream,garyrussell/spring-cloud-stream,dturanski/spring-cloud-stream,spring-cloud/spring-cloud-stream,garyrussell/spring-cloud-stream