travis: Bump timeout from 50 minutes to 90
travis: Bump timeout from 50 minutes to 90

Former-commit-id: 4c91bc4c52dcb9ba91ca8d60f9f7fbf4d5c93327
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin