benchmark: extract printTestConfig function
benchmark: extract printTestConfig function

Signed-off-by: Alberto Donato <3d6ca22374542c32836b344db03c69e81292ccc8@canonical.com>

atxwebs/lxd,atxwebs/lxd,lxc/lxd,erikmack/lxd,stgraber/lxd,pcdummy/lxd,lxc/lxd,stgraber/lxd,mjeanson/lxd,erikmack/lxd,lxc/lxd,lxc/lxd,atxwebs/lxd,hallyn/lxd,atxwebs/lxd,erikmack/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,stgraber/lxd,Skarlso/lxd,Skarlso/lxd,mjeanson/lxd,hallyn/lxd,lxc/lxd,lxc/lxd,jsavikko/lxd,pcdummy/lxd,Skarlso/lxd,jsavikko/lxd,pcdummy/lxd,stgraber/lxd,jsavikko/lxd,mjeanson/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,Skarlso/lxd,hallyn/lxd,hallyn/lxd