You should leave lo at 127.0.0.1, it can cause issues to change it like that.
Anyways there is a configuration file what is /etc/sysconfig/network-scripts/ifcfg-lo where you can change the default ip.
However I would suggest the following, copy the ifcfg-lo file to the file name ifcfg-lo:0 (within the /etc/sysconfig/network-scripts/ folder).
edit the ifcfg-lo:0 file to the following
This should set your machine up in a much better configuration.