Pivotal UI dependency: force latest v16
Pivotal UI dependency: force latest v16

Resolves #1089

cppwfs/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui,cppwfs/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,spring-cloud/spring-cloud-dataflow-ui,spring-cloud/spring-cloud-dataflow-ui,spring-cloud/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,spring-cloud/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui,cppwfs/spring-cloud-dataflow-ui,cppwfs/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui