Description of problem:
Running spacewalk-setup on a 64-bit (x86_64) installation of rhel, will generate 
an error (see below). The error complains about a library being of the wrong
ELF class. This typically indicates a 32-bit library was found instead of the 64-bit one.

Both libraries are installed:

[root@test12-64 ~]# locate libclntsh.so.10.1
/usr/lib/oracle/10.2.0.4/client64/lib/libclntsh.so.10.1
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so.10.1

We should setup the ld.conf.d correctly when we install the spacewalk rpms.

---- error ----
Could not connect to the database.  Your connection information may be
incorrect.  Error: install_driver(Oracle) failed: Can't load
'/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/auto/DBD/Oracle/Oracle.so'
for module DBD::Oracle: libclntsh.so.10.1: wrong ELF class: ELFCLASS32 at
/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/DynaLoader.pm line 230, <STDIN>
line 6.
 at (eval 784) line 3
 Compilation failed in require at (eval 784) line 3, <STDIN> line 6.
 Perhaps a required shared library or dll isn't installed where expected
  at /usr/bin/spacewalk-setup line 1492
---- error ----