Description of problem:
Tracebacks are shown with latest build for --zonemgr cli option. Found in two
test cases in automation execution.

Version-Release number of selected component (if applicable):
ipa-server-4.1.0-7.el7.x86_64

How reproducible:
Always

Steps to Reproduce:

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:
:: [   LOG    ] :: ipa-server-install-015: [Positive] Install with zonemgr
bz888124
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:

:: [ 01:52:01 ] :: Uninstall for next test
:: [  BEGIN   ] :: Uninstalling ipa server for next test :: actually running
'ipa-server-install --uninstall -U '
Shutting down all IPA services
...
Unconfiguring ipa-otpd
:: [   PASS   ] :: Uninstalling ipa server for next test (Expected 0, got 0)
:: [  BEGIN   ] :: Making sure that /etc/sssd/sssd.conf does not exist. BZ
819982 :: actually running 'ls /etc/sssd/sssd.conf'
ls: cannot access /etc/sssd/sssd.conf: No such file or directory
:: [   PASS   ] :: Making sure that /etc/sssd/sssd.conf does not exist. BZ
819982 (Expected 2, got 2)
:: [ 01:52:27 ] :: EXECUTING: ipa-server-install --setup-dns
--forwarder=10.16.36.29  -r TESTRELM.TEST -p xxxxxxxx -P xxxxxxxx -a xxxxxxxx
--zonemgr=test_admin@test.raleigh -U
:: [  BEGIN   ] :: Installing ipa server with zonemgr :: actually running
'ipa-server-install --setup-dns --forwarder=10.16.36.29  -r TESTRELM.TEST -p
xxxxxxxx -P xxxxxxxx -a xxxxxxxx --zonemgr=test_admin@test.raleigh -U'

MARK-LWD-LOOP -- 2014-11-24 01:52:29 --
Traceback (most recent call last):
  File "/usr/sbin/ipa-server-install", line 1343, in <module>
    safe_options, options = parse_options()
  File "/usr/sbin/ipa-server-install", line 288, in parse_options
    options, args = parser.parse_args()
  File "/usr/lib64/python2.7/optparse.py", line 1399, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib64/python2.7/optparse.py", line 1439, in _process_args
    self._process_long_opt(rargs, values)
  File "/usr/lib64/python2.7/optparse.py", line 1514, in _process_long_opt
    option.process(opt, value, values, self)
  File "/usr/lib64/python2.7/optparse.py", line 788, in process
    self.action, self.dest, opt, value, values, parser)
  File "/usr/lib64/python2.7/optparse.py", line 808, in take_action
    self.callback(self, opt, value, parser, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/bindinstance.py",
line 407, in zonemgr_callback
    value = value.decode(sys.stdin.encoding)
TypeError: decode() argument 1 must be string, not None
:: [   FAIL   ] :: Installing ipa server with zonemgr (Expected 0, got 1)


:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:
:: [   LOG    ] :: ipa-server-install-016: [Negative] Install with invalid
zonemgr
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:

:: [ 01:52:43 ] :: cmd=[ipa-server-install --setup-dns --forwarder=10.16.36.29
-r TESTRELM.TEST -p xxxxxxxx -P xxxxxxxx -a xxxxxxxx --zonemgr=T??ko@redhat.com
-U]
:: [ 01:52:43 ] :: expect [2],
out=[/tmp/tmp.lEFA3LcILT/ipaserverinstall_invalidzonemgr.out]
:: [ 01:52:43 ] :: Verify expected error message for IPA Install with invalid
zonemgr
:: [   FAIL   ] :: expect [2] actual [1]
--------- expected msg ---------
[error: invalid zonemgr: mail account may only include letters, numbers, -, _
and a dot. There may not be consecutive -, _ and . characters. Its parts may
not start or end with - or _]
========== execution output ===============
Traceback (most recent call last):
  File "/usr/sbin/ipa-server-install", line 1343, in <module>
    safe_options, options = parse_options()
  File "/usr/sbin/ipa-server-install", line 288, in parse_options
    options, args = parser.parse_args()
  File "/usr/lib64/python2.7/optparse.py", line 1399, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib64/python2.7/optparse.py", line 1439, in _process_args
    self._process_long_opt(rargs, values)
  File "/usr/lib64/python2.7/optparse.py", line 1514, in _process_long_opt
    option.process(opt, value, values, self)
  File "/usr/lib64/python2.7/optparse.py", line 788, in process
    self.action, self.dest, opt, value, values, parser)
  File "/usr/lib64/python2.7/optparse.py", line 808, in take_action
    self.callback(self, opt, value, parser, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/bindinstance.py",
line 407, in zonemgr_callback
    value = value.decode(sys.stdin.encoding)
TypeError: decode() argument 1 must be string, not None