Commit regarding to NMS-5918 and NMS-5919

- Extended RrdGraphController to handle width and height parameter.
- Extended RrdGraphService interface to allow width and height.
- Extended DefaultRrdGraphService to provide width and height and deal
  width already predefined RRD command with a given --width and --height
- Changed results.jsp to use the parameter width and height from prefab graph
  definition
Added test for linkd nms2295 network
Merge branch 'master' into features/linkd-scalability