Execution of latency analysis from ALISA does not hold on to AnalysisResult for successive result lookup

[reteprelief]

When latency analysis was using markers it was executed only once and then results were looked up in markers.
Now that we return AnalysisResult we need to look up successive end to end flow latency results in the AnalysisResult. Alternatively, we need to execute the latency analysis just on a specific end to end flow.