Replace uses of map()

In Python 2, map() returns a list; in Python 3 it returns an iterator.

Replace all uses by list comprehensions, generators, or for loops,
as required.

Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipatests/test_xmlrpc/test_vault_plugin.py

@@ -34,7 +34,7 @@ symmetric_vault_name = u'symmetric_test_vault'
 asymmetric_vault_name = u'asymmetric_test_vault'
 
 # binary data from \x00 to \xff
-secret = ''.join(map(chr, xrange(0, 256)))
+secret = ''.join(chr(c) for c in xrange(0, 256))
 
 password = u'password'
 other_password = u'other_password'