[MM-25673] Upgrades and migrations to start using master gorp (#14823)

Database changes needed to reflect gorp master changes

vendor/github.com/mattermost/gorp/go.mod

@@ -0,0 +1,13 @@
+module github.com/mattermost/gorp
+
+go 1.13
+
+require (
+	github.com/go-sql-driver/mysql v1.5.0
+	github.com/lib/pq v1.3.0
+	github.com/mattn/go-sqlite3 v2.0.3+incompatible
+	github.com/onsi/ginkgo v1.13.0
+	github.com/onsi/gomega v1.10.1
+	github.com/ziutek/mymysql v1.5.4
+	golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1 // indirect
+)