You want to install the i686 version of OL5.9 on your OL6.5 x86_64 host to build some packages
in the oder environment.

lxc-create –n OL5.9 –t oracle -- -u ftp://public-yum.oracle.com/OL5/9/base/i386 

lxc-create –n OL5.9 –arch=i386 –t oracle 

You cannot run an i686 container on an x86_64 host. 

lxc-create –n OL5.9 –t oracle -- -R 5.9 –arch i386