Added Oracle Java 8 to Travis CI.
Added Oracle Java 8 to Travis CI.

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