Update Slf4j to 1.7.23
Update Slf4j to 1.7.23

openam-org-ru/org.jsmpp,opentelecoms-org/jsmpp,amdtelecom/jsmpp,amdtelecom/jsmpp,opentelecoms-org/jsmpp,openam-org-ru/org.jsmpp,pmoerenhout/jsmpp-1,pmoerenhout/jsmpp-1