[MM-30984] Change default footer for copyright in 2 emails (#16508)

* Change default footer for copyright in 2 emails

* Change copyright date to 2020

* Add something back

* Put back to 2020

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/email.go

@@ -781,6 +781,8 @@ func (es *EmailService) SendPaymentFailedEmail(email string, locale string, fail
 	bodyPage.Props["Button"] = T("api.templates.over_limit_fix_now")
 	bodyPage.Props["EmailUs"] = T("api.templates.email_us_anytime_at")
 
+	bodyPage.Props["Footer"] = T("api.templates.copyright")
+
 	bodyPage.Props["FailedReason"] = failedPayment.FailureMessage
 
 	if err := es.sendMail(email, subject, bodyPage.Render()); err != nil {
@@ -803,6 +805,8 @@ func (es *EmailService) SendNoCardPaymentFailedEmail(email string, locale string
 	bodyPage.Props["Button"] = T("api.templates.payment_failed_no_card.button")
 	bodyPage.Props["EmailUs"] = T("api.templates.email_us_anytime_at")
 
+	bodyPage.Props["Footer"] = T("api.templates.copyright")
+
 	if err := es.sendMail(email, subject, bodyPage.Render()); err != nil {
 		return model.NewAppError("SendPaymentFailedEmail", "api.user.send_password_reset.send.app_error", nil, "err="+err.Message, http.StatusInternalServerError)
 	}

i18n/en.json

@@ -2608,7 +2608,7 @@
   },
   {
     "id": "api.templates.copyright",
-    "translation": "© 2017 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
+    "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
   },
   {
     "id": "api.templates.deactivate_body.info",

i18n/ja.json

@@ -7987,7 +7987,7 @@
   },
   {
     "id": "api.templates.copyright",
-    "translation": "© 2017 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
+    "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
   },
   {
     "id": "api.templates.at_limit_title",

i18n/nl.json

@@ -8000,7 +8000,7 @@
   },
   {
     "id": "api.templates.copyright",
-    "translation": "© 2017 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
+    "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
   },
   {
     "id": "api.templates.at_limit_title",

i18n/pt-BR.json

@@ -8132,7 +8132,7 @@
   },
   {
     "id": "api.templates.copyright",
-    "translation": "© 2017 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
+    "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
   },
   {
     "id": "api.templates.at_limit_title",

i18n/ro.json

@@ -7893,7 +7893,7 @@
   },
   {
     "id": "api.templates.copyright",
-    "translation": "© 2017 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
+    "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
   },
   {
     "id": "api.templates.at_limit_title",

i18n/tr.json

@@ -8068,7 +8068,7 @@
   },
   {
     "id": "api.templates.copyright",
-    "translation": "© 2017 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
+    "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
   },
   {
     "id": "api.templates.at_limit_title",

i18n/zh-CN.json

@@ -8019,7 +8019,7 @@
   },
   {
     "id": "api.templates.copyright",
-    "translation": "© 2017 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
+    "translation": "© 2020 Mattermost, Inc. 855 El Camino Real, 13A-168, Palo Alto, CA, 94301"
   },
   {
     "id": "api.templates.at_limit_title",