Update date in output message after docker ce is upgraded to 17.12

Author: q131172019

src/main/java/worker/Worker.java

@@ -74,7 +74,7 @@ static Connection connectToDB(String host) throws SQLException {
         try {
           conn = DriverManager.getConnection(url, "postgres", "");
         } catch (SQLException e) {
-          System.err.println("Waiting for Stateful PostGreSQL Primary db on 02/28/2019");
+          System.err.println("Waiting for Stateful PostGreSQL Primary db on 02-28-2019");
           sleep(1000);
         }
       }
@@ -88,7 +88,7 @@ static Connection connectToDB(String host) throws SQLException {
       System.exit(1);
     }
 
-    System.err.println("Connected to Stateful PostGreSQL Primary db on 02/26/2019");
+    System.err.println("Connected to Stateful PostGreSQL Primary db on 02-28-2019");
     return conn;
   }