Add snr and nup cuts to track clustering processors

[cclaessens]

• [x] Apply cuts to swf candidates in OTC
• [x] Apply cuts to swf candidates in ITC
• [x] Include new swf variables in OTC
• [x] Include new swf variables in ITC
• [x] Include new track properties in OTC
• [x] Include new track properties in ITC

[cclaessens]

I should actually not have done that but it is included in PR #146 Issue #149 addresses this.