The consolidation of build configs: googleapis/java-spanner#2865 is causing the downstream client-library-check.sh to fail (currently failing for java-spanner and java-pubsub as those repos have had the change implemented).

This is because the downstream check replaces the google-cloud-shared-config artifact in the pom.xml and checks that it compiles. However, the consolidation of the build configs removes the google-cloud-shared-config artifact from the pom.xml so the test has nothing to replace. The tests will need to be reworked to account for this build config change.