travis: Use travis_retry for install operations
travis: Use travis_retry for install operations

Snaipe/Criterion,offa/Criterion,Snaipe/Criterion,offa/Criterion,offa/Criterion,Snaipe/Criterion,am11/Criterion,a1lu/Criterion,a1lu/Criterion,am11/Criterion,offa/Criterion,offa/Criterion,am11/Criterion,Snaipe/Criterion,Snaipe/Criterion,a1lu/Criterion,am11/Criterion,a1lu/Criterion,am11/Criterion,a1lu/Criterion