Tools: Fix pastebinit configuration

This change fixes the Puppet setup of pastebinit and also clarifies
that the configuration does not make pastes go to the Tools paste tool
by default, but just adds it as an option for the user to choose.

Change-Id: I666b0a4715319d614fc5d0bc5d43dcdc068da8f3
Merge "Tools: Fix pastebinit configuration" into production