Move ca_certs from 'remote' to 'terraform'

Did this as the CA Cert if needed for all terraform commands, not
just remote.  So just made more sense to move it to base of vargs.

main.go

@@ -14,12 +14,12 @@ type terraform struct {
 	Remote remote            `json:"remote"`
 	Plan   bool              `json:"plan"`
 	Vars   map[string]string `json:"vars"`
+	Cacert string            `json:"ca_cert"`
 }
 
 type remote struct {
 	Backend string            `json:"backend"`
 	Config  map[string]string `json:"config"`
-	Cacert  string            `json:"ca_cert"`
 }
 
 func main() {
@@ -33,8 +33,8 @@ func main() {
 
 	var commands []*exec.Cmd
 	remote := vargs.Remote
-	if remote.Cacert != "" {
-		commands = append(commands, installCaCert(remote.Cacert))
+	if vargs.Cacert != "" {
+		commands = append(commands, installCaCert(vargs.Cacert))
 	}
 	if remote.Backend != "" {
 		commands = append(commands, remoteConfigCommand(remote))