Description of problem: ipa server uninstall with -v option displays "IOError:
[Errno 9] Bad file descriptor Logged from file ipautil.py, line 442"


Version-Release number of selected component (if applicable):
ipa-server-4.5.0-21.el7_4.1.x86_64

How reproducible:Always


Steps to Reproduce:
1. Install IPA server
2. Uninstall ipa-server using the verbose option

#ipa-server-install --uninstall -U -v

Actual results: The console log displays the below message.

1. Check the below section
ipa         : DEBUG    stderr=
ipa         : DEBUG    Removing service keytab: /etc/dirsrv/ds.keytab
ipa         : DEBUG    Removing service credentials cache
ipa         : DEBUG    Starting external process
ipa         : DEBUG    args=/usr/bin/kdestroy
ipa         : DEBUG    Process finished, return code=0
ipa         : DEBUG    stdout=
ipa         : DEBUG    stderr=Traceback (most recent call last):
  File "/usr/lib64/python2.7/logging/__init__.py", line 875, in emit
    self.flush()
  File "/usr/lib64/python2.7/logging/__init__.py", line 835, in flush
    self.stream.flush()
IOError: [Errno 9] Bad file descriptor
Logged from file ipautil.py, line 442
ipa         : DEBUG    runas=dirsrv (UID 389, GID 389)

=========

2. Check the traceback seen at the end of the uninstall section.
ipa         : DEBUG    Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ipapython/install/common.py", line 91,
in _handle_execute_exception
    super(Continuous, self)._handle_execute_exception(exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 463,
in _handle_execute_exception
    self._handle_exception(exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 453,
in _handle_exception
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 424,
in __runner
    step()
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 421,
in <lambda>
    step = lambda: next(self.__gen)
  File "/usr/lib/python2.7/site-packages/ipapython/install/util.py", line 81,
in run_generator_with_yield_from
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/util.py", line 59,
in run_generator_with_yield_from
    value = gen.send(prev_value)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 658,
in _configure
    next(executor)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 434,
in __runner
    exc_handler(exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 463,
in _handle_execute_exception
    self._handle_exception(exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 521,
in _handle_exception
    self.__parent._handle_exception(exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 453,
in _handle_exception
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 518,
in _handle_exception
    super(ComponentBase, self)._handle_exception(exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 453,
in _handle_exception
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 424,
in __runner
    step()
  File "/usr/lib/python2.7/site-packages/ipapython/install/core.py", line 421,
in <lambda>
    step = lambda: next(self.__gen)
  File "/usr/lib/python2.7/site-packages/ipapython/install/util.py", line 81,
in run_generator_with_yield_from
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/site-packages/ipapython/install/util.py", line 59,
in run_generator_with_yield_from
    value = gen.send(prev_value)
  File "/usr/lib/python2.7/site-packages/ipapython/install/common.py", line 71,
in _uninstall
    for _nothing in self._uninstaller(self.parent):
  File "/usr/lib/python2.7/site-packages/ipaserver/install/server/__init__.py",
line 584, in main
    uninstall(self)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/server/install.py",
line 248, in decorated
    func(installer)
  File "/usr/lib/python2.7/site-packages/ipaserver/install/server/install.py",
line 1160, in uninstall
    sys.exit(rv)
SystemExit: 0

Expected results:

1. Although it doesn't seem to break anything, we should fix the above
traceback seen.

2. Although the 'SystemExit: 0', if possible we should also fix the traceback
to have a clean uninstall log file which doesn't confuse the end user.


Additional info: