Moving ROUND_ROBIN_ALGORITHM_ID & ONE_AFTER_ANOTHER_ALGORITHM_ID constants from AutoscalerConstants to StratosConstants

[Rajkumar Rajaratnam]

Hi Devs,

I am doing $Subject since CC also needs these constants.

Thanks.

-- 
Rajkumar Rajaratnam
Committer & PMC Member, Apache Stratos
Software Engineer, WSO2

Mobile : +94777568639
Blog : rajkumarr.com