Add collector post/preun/postun scripts. Remove systemctl enable
Add collector post/preun/postun scripts. Remove systemctl enable

matyasselmeci/htcondor-ce,opensciencegrid/htcondor-ce,brianhlin/htcondor-ce,brianhlin/htcondor-ce,matyasselmeci/htcondor-ce,brianhlin/htcondor-ce,djw8605/htcondor-ce,djw8605/htcondor-ce,matyasselmeci/htcondor-ce,bbockelm/htcondor-ce,bbockelm/htcondor-ce,djw8605/htcondor-ce,opensciencegrid/htcondor-ce,bbockelm/htcondor-ce,opensciencegrid/htcondor-ce