run travis integration tests on scylla

.travis_start_db.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -e
+
+case ${DB} in
+
+scylla)
+    echo "deb [arch=amd64] http://s3.amazonaws.com/downloads.scylladb.com/deb/ubuntu trusty scylladb-1.7/multiverse" | sudo tee -a /etc/apt/sources.list > /dev/null
+    sudo apt-get -qq update
+    sudo apt-get install -y --allow-unauthenticated scylla-server
+    sudo /usr/bin/scylla --options-file /etc/scylla/scylla.yaml ${SCYLLA_OPTS} ${SCYLLA_OPTS_LOG} &
+    ;;
+
+cassandra)
+    sudo service cassandra start
+    ;;
+
+*)
+    env
+    false
+    ;;
+
+esac