Resolve fallout from pmlogger handling of alias names (pmlc)
Resolve fallout from pmlogger handling of alias names (pmlc)

Several QA tests using pmlc were now failing after the recent
metric name cache lookup changes (corrupt archives generated)
- the pmlogger control interface now works properly once more.

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