CLI: Fix config flag being ignored

Passing --config had no effect when passed.  It will now be applied as
the last config file and before any env var overrrides.

pkg/cmd/common.go

@@ -0,0 +1,13 @@
+package cmd
+
+import (
+	"github.com/codegangsta/cli"
+	"github.com/grafana/grafana/pkg/services/sqlstore"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+func initRuntime(c *cli.Context) {
+	setting.NewConfigContext(c.GlobalString("config"))
+	sqlstore.NewEngine()
+	sqlstore.EnsureAdminUser()
+}