Added support for printing test duration.
Added support for printing test duration.

thomasmaurel/ensj-healthcheck,thomasmaurel/ensj-healthcheck,thomasmaurel/ensj-healthcheck,Ensembl/ensj-healthcheck,thomasmaurel/ensj-healthcheck,Ensembl/ensj-healthcheck,Ensembl/ensj-healthcheck,Ensembl/ensj-healthcheck