Investigate possibility to enable telemetry wsmaster startNumber interceptor and AttributesCompleter

[ibuziuk]

https://github.com/redhat-developer/rh-che/tree/master/plugins/che-plugin-analytics/che-plugin-analytics-wsmaster/src/main/java/com/redhat/che/plugin/analytics/wsmaster

[pdaverh]

Can you please add a brief note about the benefit of enabling wsmaster startNumber interceptor and AttributesCompleter? Thanks!