Description of problem:
When working on Bug 740403, installed server by passing the DS password with a
backslash, in cmd line, and the install fails with error:

  [13/17]: restarting certificate server
root        : CRITICAL Failed to restart the certificate server. See the
installation log for details.
  [14/17]: requesting RA certificate from CA

Version-Release number of selected component (if applicable):
ipa-server-2.1.3-9.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. Install server using command:
ipa-server-install --setup-dns --forwarder=10.14.63.12  -r TESTRELM -p
Secret\123 -P Secret123 -a Secret123

Actual results:
Install fails with:
[13/17]: restarting certificate server
root        : CRITICAL Failed to restart the certificate server. See the
installation log for details.
  [14/17]: requesting RA certificate from CA


Expected results:
Install should have reported error that the DS password cannot have a
backslash, before starting the install


Additional info: