Rename WorkerAux module to Worker

Master.hs

@@ -21,7 +21,7 @@ import Table
   , freq_from_stat
   , freq_to_stat
   )
-import WorkerAux
+import Worker
   ( verts_recvd_from_stat
   , credit_retd_from_stat
   , min_atomic_credit_from_stat

Sequential.hs

@@ -21,7 +21,7 @@ import Table
   , new
   , to_list
   )
-import WorkerAux
+import Worker
   ( now
   )
 import Types

WorkerAux.hs → Worker.hs

 --
 -- orbit-int workeraux 
 --
-module WorkerAux ( defaultCt
+module Worker ( defaultCt
               , now
               , worker_stats
               , verts_recvd_from_stat