(PUP-3081) Indicate catalog benchmark is for application

The message "Finished catalog run in $x seconds" may mislead users into
believing that the operation being benchmarked includes both catalog
catalog compilation, downloading, and application. The actual operation
being timed is the catalog application. We should give more indication
of this when reporting the benchmarked time.
Merge pull request #3121 from adrienthebo/maint/master/catalog-application-benchmark-message

(PUP-3081) Indicate catalog benchmark is for application