issue1926124: fix crash in roundup_admin migrate option wih anydbm

Patch submitted by Henry (henryl), modified value to False
since this produces the correct "No migration action required"
output from the migrate command.

Author: rouilj

CHANGES.txt

@@ -157,7 +157,11 @@ Fixed:
   http://hg.python.org/tracker/roundup/rev/98508a47c126 by
   Martin.V.Loewis. Numeric test patch applied, Integer code and tests
   developed by John Rouillard.
-
+- issue1926124: fix crash in roundup_admin migrate option.
+  Patch submitted by Henry (henryl), modified value to False
+  since this produces the correct "No migration action required"
+  output from the migrate command.
+  
 2016-01-11: 1.5.1
 
 Pay attention:

roundup/backends/back_anydbm.py

@@ -147,6 +147,9 @@ class Database(FileStorage, hyperdb.Database, roundupdb.Database):
 
     dbtype = "anydbm"
 
+    # used by migrate roundup_admin command. Is a no-op for anydbm.
+    # but needed to stop traceback in admin.
+    db_version_updated = False
 
     def __init__(self, config, journaltag=None):
         """Open a hyperdatabase given a specifier to some storage.