Disable Gfycat by default during Beta and move default keys to server (#9027)

* Update default.json

* Update diagnostics.go

* Added default Gfycat API credentials to server

* Fixed default Gfycat credentials

app/diagnostics.go

@@ -208,6 +208,9 @@ func (a *App) trackConfig() {
 		"enable_user_access_tokens":                               *cfg.ServiceSettings.EnableUserAccessTokens,
 		"enable_custom_emoji":                                     *cfg.ServiceSettings.EnableCustomEmoji,
 		"enable_emoji_picker":                                     *cfg.ServiceSettings.EnableEmojiPicker,
+		"enable_gif_picker":                                       *cfg.ServiceSettings.EnableGifPicker,
+		"gfycat_api_key":                                          isDefault(*cfg.ServiceSettings.GfycatApiKey, model.SERVICE_SETTINGS_DEFAULT_GFYCAT_API_KEY),
+		"gfycat_api_secret":                                       isDefault(*cfg.ServiceSettings.GfycatApiSecret, model.SERVICE_SETTINGS_DEFAULT_GFYCAT_API_SECRET),
 		"experimental_enable_authentication_transfer":             *cfg.ServiceSettings.ExperimentalEnableAuthenticationTransfer,
 		"restrict_custom_emoji_creation":                          *cfg.ServiceSettings.RestrictCustomEmojiCreation,
 		"enable_testing":                                          cfg.ServiceSettings.EnableTesting,