Currently puppet-horizon has implementations to allow more flexible
customization of specific dashboars(heat, octavia and manila) while
it provides the basic one to only install plugin packages.
This change adds a warning message to let users aware of the new
classes which provides more complete support for dashboard parameters.
Change-Id: I1baa3f166ef895bfb55302f144b696a9ace293cc
Takashi Kajinami
8bf867856f