Pull Request #4 Skip connection.setSendTimeAsDatetime when not available.
Was getting the following with Rails 5.0 and 5.1
```
NoMethodError (undefined method `setSendTimeAsDatetime' for #<Java::ComMicrosoftSqlserverJdbc::SQLServerConnection:0x70ee1963>)
Did you mean? sendTimeAsDatetime
```
This guard clause fixed it for me.
