Merge pull request #174 from data-integrations/fix/ut-oracle

fix oracle plugin ut

Author: greeshmaswaminathan

oracle-plugin/src/test/java/io/cdap/plugin/oracle/OracleFailedConnectionTest.java

@@ -31,8 +31,9 @@ public void test() throws ClassNotFoundException, IOException {
       new OracleConnectorConfig("localhost", 1521, "username", "password", "jdbc", ""));
 
     super.test(JDBC_DRIVER_CLASS_NAME, connector, "Failed to create connection to database via connection string:" +
-                                                    " jdbc:oracle:thin:@localhost:1521 and arguments: {user=username," +
-                                                    " oracle.jdbc.timezoneAsRegion=false, internal_logon=normal}. " +
-                                                    "Error: ConnectException: Connection refused.");
+                                                    " jdbc:oracle:thin:@localhost:1521:null and arguments: " +
+                                                    "{user=username, oracle.jdbc.timezoneAsRegion=false, " +
+                                                    "internal_logon=normal}. Error: ConnectException: Connection " +
+                                                    "refused.");
   }
 }