Remove WhiteRev and BUYMORE suffixes from release group names

src/NzbDrone.Core.Test/ParserTests/ReleaseGroupParserFixture.cs

@@ -32,6 +32,8 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Blue.Bloods.S08E05.The.Forgotten.1080p.AMZN.WEB-DL.DDP5.1.H.264-NTb-Rakuv", "NTb")]
         [TestCase("Lie.To.Me.S01E13.720p.BluRay.x264-SiNNERS-Rakuvfinhel", "SiNNERS")]
         [TestCase("Who.is.America.S01E01.INTERNAL.720p.HDTV.x264-aAF-RakuvUS-Obfuscated", "aAF")]
+        [TestCase("Deadly.Class.S01E10.Sink.With.California.1080p.AMZN.WEB-DL.DDP5.1.H.264-NTG-WhiteRev", "NTG")]
+        [TestCase("The.Walking.Dead.S09E12.Guardians.REPACK.1080p.AMZN.WEB-DL.DD.5.1.H.264-CasStudio-BUYMORE", "CasStudio")]
         [TestCase("Series Title - S01E01 - Episode Title [RlsGroup]", "RlsGroup")]
         [TestCase("Black Monday S01 E01-E02 1080p AMZN WEBRip DDP5.1 x264 monkee", null)]
         //[TestCase("", "")]

src/NzbDrone.Core/Parser/Parser.cs

@@ -324,7 +324,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex SixDigitAirDateRegex = new Regex(@"(?<=[_.-])(?<airdate>(?<!\d)(?<airyear>[1-9]\d{1})(?<airmonth>[0-1][0-9])(?<airday>[0-3][0-9]))(?=[_.-])",
                                                                         RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-        private static readonly RegexReplace CleanReleaseGroupRegex = new RegexReplace(@"^(.*?[-._ ](S\d+E\d+)[-._ ])|(-(RP|1|NZBGeek|Obfuscated|Scrambled|sample|Pre|postbot|xpost|Rakuv[a-z]*))+$",
+        private static readonly RegexReplace CleanReleaseGroupRegex = new RegexReplace(@"^(.*?[-._ ](S\d+E\d+)[-._ ])|(-(RP|1|NZBGeek|Obfuscated|Scrambled|sample|Pre|postbot|xpost|Rakuv[a-z]*|WhiteRev|BUYMORE))+$",
                                                                 string.Empty,
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);