py3: remove Exception.message appearances

Exception.message is removed in Python3

https://pagure.io/freeipa/issue/4985
https://pagure.io/freeipa/issue/6874

Reviewed-By: Pavel Vomacka <pvomacka@redhat.com>

install/tools/ipa-adtrust-install

@@ -180,8 +180,8 @@ def main():
         principal = krb_utils.get_principal()
     except errors.CCacheError as e:
         raise ScriptError(
-            "Must have Kerberos credentials to setup AD trusts on server: %s"
-            % e.message)
+            "Must have Kerberos credentials to setup AD trusts on server: "
+            "{err}".format(err=e))
 
     try:
         api.Backend.ldap2.connect()

install/tools/ipa-replica-manage

@@ -1447,7 +1447,7 @@ def set_DNA_range(hostname, range, realm, dirman_passwd, next_range=False,
             entries = repl.conn.get_entries(dn, repl.conn.SCOPE_ONELEVEL,
                                         "(objectclass=ipaDomainIDRange)")
         except errors.NotFound as e:
-            sys.exit('Unable to load IPA ranges: %s' % e.message)
+            sys.exit('Unable to load IPA ranges: {err}'.format(err=e))
 
         for ent in entries:
             entry_start = int(ent.single_value['ipabaseid'])