Description of problem:
Postinstall script in redhat-config-print might fail because it needs
alchemist, which is not required.

postinstall scriptlet (using /bin/sh):
# The gimp-print driver changed its name, so update the configuration.
/usr/share/printconf/util/updateconf.py


Version-Release number of selected component (if applicable):
redhat-config-printer-0.6.47.11-1

How reproducible:
install redhat-config-printer without alchemist already installed. 

Steps to Reproduce:
1. rpm -e alchemist redhat-config-printer
2. rpm -i redhat-config-printer-0.6.47.11-1.i386.rpm

  
Actual results:
Traceback (most recent call last):
 File "/usr/share/printconf/util/updateconf.py", line 29, in ?
  import printconf_conf as conf
 File "/usr/share/printconf/util/printconf_conf.py", line 580, in?
  from pyalchemist import *
ImportError: No module named pyalchemist

Expected results:
no output