Error in QMOOD metrics calculation

[mashalahmad]

Hi
@qxo @bzafiris @gboissiere
I ran the plugin on multiple projects successfully but the problem that I noticed is it always give Functionality values "0" when i looked into formulae that wasn't correct for functionality it should be

0.12CAM+0.22NOPM+0.22CIS +0.22DSC+0.22NOH but implemented one is
0.12CAM-0.22NOPM+0.22CIS +0.22DSC+0.22NOH which gives zero values always kindly correct it.
this is path of file [https://github.com/qxo/eclipse-metrics-plugin/blob/master/net.sourceforge.metrics/src/net/sourceforge/metrics/calculators/qmood/Functionality.java](path of file)