[GOBBLIN-1215] adding travis retry
[GOBBLIN-1215] adding travis retry

Closes #3030 from vikrambohra/travisRetry

arjun4084346/gobblin,abti/gobblin,shirshanka/gobblin,linkedin/gobblin,arjun4084346/gobblin,jack-moseley/gobblin,shirshanka/gobblin,shirshanka/gobblin,abti/gobblin,shirshanka/gobblin,abti/gobblin,jack-moseley/gobblin,abti/gobblin,abti/gobblin,jack-moseley/gobblin,jack-moseley/gobblin,arjun4084346/gobblin,linkedin/gobblin,linkedin/gobblin,arjun4084346/gobblin,jack-moseley/gobblin,linkedin/gobblin,abti/gobblin,shirshanka/gobblin,linkedin/gobblin,linkedin/gobblin,arjun4084346/gobblin