pmdaproc.sh: fine tune delays
pmdaproc.sh: fine tune delays

Had to increase the signal delay from 0.2 to 1 (sec) to get reliable
QA results, especially on vm04 (i586, CentOS 5.11).

At the same time, parameterize this as $signal_delay to simplify
any tuning in the future.

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