pmdaslurm - fix hostname lookup
pmdaslurm - fix hostname lookup

edwardt/pcp,adfernandes/pcp,aeg-aeg/pcpfans,edwardt/pcp,aeg-aeg/pcpfans,adfernandes/pcp,adfernandes/pcp,wuliming/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans,wuliming/pcp,edwardt/pcp,aeg-aeg/pcpfans,edwardt/pcp,edwardt/pcp,aeg-aeg/pcpfans,wuliming/pcp,edwardt/pcp,adfernandes/pcp,edwardt/pcp,aeg-aeg/pcpfans,wuliming/pcp,wuliming/pcp,wuliming/pcp,edwardt/pcp,adfernandes/pcp,aeg-aeg/pcpfans,wuliming/pcp,adfernandes/pcp,wuliming/pcp,adfernandes/pcp,adfernandes/pcp