Don't force snapshot update for integration tests

See if that fixes intermittent NoClassDefFoundError.

See gh-12689

ci/scripts/build-integration-tests.sh

@@ -5,5 +5,5 @@ source $(dirname $0)/common.sh
 repository=$(pwd)/distribution-repository
 
 pushd git-repo > /dev/null
-run_maven -f spring-boot-tests/spring-boot-integration-tests/pom.xml clean install -U -Dfull -Drepository=file://${repository}
+run_maven -f spring-boot-tests/spring-boot-integration-tests/pom.xml clean install -Dfull -Drepository=file://${repository}
 popd > /dev/null