Description of problem:
create common user during os installation 

Version-Release number of selected component (if applicable):
F19AlphaRC4

How reproducible:
probably always, tried once 

Steps to Reproduce:
1. during anaconda install create user (example: blah)
2. id blah 
3. grep blah /etc/passwd
  
Actual results:
2. uid=1000(blah) gid=0(root) groups=0(root)
3. blah:x:0:blah

Expected results:
uid=1000(blah) gid=1000(blah) groups=1000(blah)

Additional info:
likely a security issue
fix: edit /etc/passwd after installation
workaround: add users no earlier then at firstboot