Add workaround for reloading haproxy on Fedora

We want to be able to reload haproxy, but the upstream service file
for haproxy fails when we do.  This overwrites the upstream service
file with a fixed one that will eventually be added to the upstream
package.

Change-Id: I63bca52d7601850de87456fbb221a8400c6933aa
Related-Bug: 1348931