remove rhel5 spec stuff

There are several sections in the rpm spec file that are only needed for RHEL5.
We are not supported on RHEL5 due to various dependencies not available in RHEL5.
I am pulling out all of these various things, because I have to do it for each package when we put them in Fedora.

remove BuildRoot:
remove %clean section
remove rm -rf %{buildroot} from install section
remove %defattr(-,root,root,-) from file section, when not needed