[CI] rtmon per test

so far we had 1 default cfg file for real time processing check (html table).
now we can have a specific file per test, the yaml config file has to be specified in the xml

<class>Initialize_eNB</class>  
<desc>Initialize gNB</desc>  
...  
<rt_stats_cfg>datalog_rt_stats.2x2.yaml</rt_stats_cfg>  
...

missing : test fails if checker fails