Creative segment filter support with SDK segment filter (for MRAID capable bid request ) 

Added support at creative level for segment filters. Also tests for this has been added.
Also, a first creative segment filter was added. It is called "supportedSDKs" and let you bid in specific bid request that has MRAID support (also other sdks like VPAID and ORMMA).

Since both these creative functions are the same as the add/removeConfig functions we should just keep one of them. Keeps the interface simple.