groups graphs not loading

[shadowguardian507-irl]

subsiquent to some work to un-break group creation/edits (see pull request #62) I find that the group graphs page does not work.

upon clicking the view feed option (the eye button in the upper left)

the graph will not load any you get an error message

I think I have traced this down to an error in how the groups handles feed data
eg http://SYSTEM_IP/group/getfeed/data.json?id=3&start=1576962900000&end=1577568600000&interval=900&skipmissing=0&limitinterval=undefined
results in
{"success":false,"message":"Error reading meta data feedid=3"}

this ties up with error messages, as follows, in the logs
2019-12-28 21:17:40.593|WARN|PHPFina.php|get_meta() meta file does not exist '/var/lib/phpfina/3.meta'
that imply that for some reason it is not following the folder directive in the ini file. ie

phpfina[datadir] = '/var/opt/emoncms/phpfina/'
phptimeseries[datadir] = '/var/opt/emoncms/phptimeseries/'