Require /usr/sbin/useradd instead of package shadow-utils.

Reason:  useradd was moved from package shadow-utils to
package shadow in OpenSuse 12.3, and OpenSuse 12.3 doesn't
have package shadow-utils.


git-svn-id: https://svn.microneil.com/svn/PKG-SNF-CS-NIX/trunk@103 233e721a-07f6-49eb-a7da-05e0e16828fc

SNF_CS_Developer_Package/snf-server.spec.in

 Source: @PACKAGE_NAME@-@VERSION@.tar.gz
 
 # Dependencies.
-Requires(pre): shadow-utils
+Requires(pre): /usr/sbin/useradd
 
 Requires: curl