Do not use Lightblue "deprecated" field. Use "release_categories" instead.
    
    The "deprecated" field in Lightblue is not used anymore and it is not
    filled correctly by COMET. Instead, there is new "Deprecated"
    release_category. See METAXOR-2215 for more info.
    
    We have never actually used "deprecated" option anywhere in Freshmaker
    code, because we always used the default False value to query only
    for non-deprecated images.
    
    In this commit, the "deprecated" argument is removed from Lightblue
    class completely. If we ever need to query for deprecated images,
    we need to use "Deprecated" release category.