Clean up SdnIp code
Clean up SdnIp code

- Apply multiple exception catching
- Array creation is replaced with varargs

Change-Id: I9d7267c8cb4d35d84e974a4634f19350f265b9bf

opennetworkinglab/spring-open,opennetworkinglab/spring-open,opennetworkinglab/spring-open,opennetworkinglab/spring-open,opennetworkinglab/spring-open,opennetworkinglab/spring-open