Workaround PAPI_remove_event bug for papi.disable
Workaround PAPI_remove_event bug for papi.disable

papi seems to have an error when trying to remove a counter and then
retarting the eventset.  We need to now work around it by saving the
counters that we have active, destroying the eventset, and then
readding the counters we're still interested in one by one

*src/pmdas/papi/papi.c - add position var and workaround for papi_remove_event
		       	 error

prasincs/pcp,tjanez/pcp,mbaldessari/pcp,aeg-aeg/pcpfans,adfernandes/pcp,edwardt/pcp,aeg-aeg/pcpfans,prasincs/pcp,andyvand/cygpcpfans,tjanez/pcp,prasincs/pcp,aeg-aeg/pcpfans,wuliming/pcp,wuliming/pcp,tjanez/pcp,aeg-aeg/pcpfans,mbaldessari/pcp,mbaldessari/pcp,wuliming/pcp,edwardt/pcp,adfernandes/pcp,aeg-aeg/pcpfans,wuliming/pcp,tjanez/pcp,adfernandes/pcp,adfernandes/pcp,edwardt/pcp,andyvand/cygpcpfans,wuliming/pcp,edwardt/pcp,prasincs/pcp,edwardt/pcp,andyvand/cygpcpfans,prasincs/pcp,adfernandes/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,prasincs/pcp,adfernandes/pcp,andyvand/cygpcpfans,mbaldessari/pcp,tjanez/pcp,tjanez/pcp,adfernandes/pcp,wuliming/pcp,mbaldessari/pcp,wuliming/pcp,edwardt/pcp,aeg-aeg/pcpfans,adfernandes/pcp,tjanez/pcp,prasincs/pcp,andyvand/cygpcpfans,tjanez/pcp,edwardt/pcp,wuliming/pcp,prasincs/pcp,aeg-aeg/pcpfans,mbaldessari/pcp,andyvand/cygpcpfans,andyvand/cygpcpfans,edwardt/pcp