<node spec> bug 949543 use resource_limits.template directly as .conf in RPM

https://bugzilla.redhat.com/show_bug.cgi?id=949543
(Origin clone of Enterprise https://bugzilla.redhat.com/show_bug.cgi?id=949260)
This change causes the node RPM to own the resource_limits.conf file so that
when it changes, users will at least get a .rpmnew file to show that they
might want to look at updating their resource_limits.conf file to incorporate
the changes.
Merge pull request #1978 from sosiouxme/bz949543

<node spec> bug 949543 use resource_limits.template directly as .conf in...