Normalize metric names across ct-mapreduce and crlite

[jcjones]

Here's the current set:

stats.create_filter_cascade.CreateCertLists.Issuers
stats.create_filter_cascade.CreateCertLists.KnownNotRevoked
stats.create_filter_cascade.CreateCertLists.KnownRevoked
stats.ct-fetch.insertCTWorker.Inserted
stats.gauges.create_filter_cascade.CreateCertLists.VirtualMemory.available
stats.gauges.create_filter_cascade.GenerateMLBF.BitCount
stats.gauges.create_filter_cascade.GenerateMLBF.LayerCount
stats.timers.aggregate-crls.KeysToChan
stats.timers.aggregate-crls.List
stats.timers.aggregate-known.KeysToChan
stats.timers.aggregate-known.SetToChan
stats.timers.create_filter_cascade.CreateCertLists
stats.timers.create_filter_cascade.FindAdditions
stats.timers.create_filter_cascade.GenerateMLBF
stats.timers.create_filter_cascade.LoadRevokedCerts
stats.timers.create_filter_cascade.Main
stats.timers.create_filter_cascade.SaveAdditions
stats.timers.create_filter_cascade.SaveMLBF
stats.timers.create_filter_cascade.VerifyMLBF
stats.timers.ct-fetch.ExpireAt
stats.timers.ct-fetch.insertCTWorker.ParseCertificates
stats.timers.ct-fetch.insertCTWorker.Store
stats.timers.ct-fetch.LogWorker.GetRawEntries
stats.timers.ct-fetch.LogWorker.LogEntryFromLeaf
stats.timers.ct-fetch.LogWorker.ProcessedEntry
stats.timers.ct-fetch.LogWorker.saveState
stats.timers.ct-fetch.LogWorker.SubmittedToChannel
stats.timers.ct-fetch.SetInsert
stats_counts.create_filter_cascade.CreateCertLists.Issuers
stats_counts.create_filter_cascade.CreateCertLists.KnownNotRevoked
stats_counts.create_filter_cascade.CreateCertLists.KnownRevoked
stats_counts.ct-fetch.certIsFilteredOut.expired

Particularly I'd like to ensure they all have the same capitalization and specificity.