Merge remote-tracking branch 'masterzen/feature/instrumentation' into 2.7.x

• masterzen/feature/instrumentation: Set of faces to manage instrumentation listeners, data and probes Example probes for the indirector Add probe indirection for probe management Process name instrumentation listener Add the 'performance' instrumentation listener Add the example 'log' listener Add a way to add probe to puppet code Add indirection (REST usable) to manipulate instrumentation Instrumentation foundation layer