Add Japanese translations for mysql Node (#841)

storage/mysql/locales/en-US/68-mysql.json

@@ -0,0 +1,24 @@
+{
+    "mysql": {
+        "label": {
+            "host": "Host",
+            "port": "Port",
+            "user": "User",
+            "password": "Password",
+            "database": "Database",
+            "timezone": "Timezone",
+            "charset": "Charset"
+        },
+        "status": {
+            "badping": "Bad Ping",
+            "error": "Error",
+            "ok": "OK",
+            "notconnected": "not yet connected"
+        },
+        "errors": {
+            "notstring": "the query is not defined as a string",
+            "notconnected": "Database not connected",
+            "notconfigured": "MySQL database not configured"
+        }
+    }
+}