Adding default timeouts to mysql datasource and missing LicenseFileLocation prop (#6011)

config/config.json

@@ -1,6 +1,7 @@
 {
     "ServiceSettings": {
         "SiteURL": "http://localhost:8065",
+        "LicenseFileLocation": "",
         "ListenAddress": ":8065",
         "ConnectionSecurity": "",
         "TLSCertFile": "",
@@ -68,7 +69,7 @@
     },
     "SqlSettings": {
         "DriverName": "mysql",
-        "DataSource": "mmuser:mostest@tcp(dockerhost:3306)/mattermost_test?charset=utf8mb4,utf8",
+        "DataSource": "mmuser:mostest@tcp(dockerhost:3306)/mattermost_test?charset=utf8mb4,utf8&readTimeout=30s&writeTimeout=30s",
         "DataSourceReplicas": [],
         "MaxIdleConns": 20,
         "MaxOpenConns": 300,