Rename 'placement_group_list' to 'placement_group_view'
Rename 'placement_group_list' to 'placement_group_view'

Using 'view' for the verb is more consistent with the feature type and
other similar features.

ManageIQ/manageiq,jrafanie/manageiq,jrafanie/manageiq,ManageIQ/manageiq,kbrock/manageiq,ManageIQ/manageiq,jrafanie/manageiq,ManageIQ/manageiq,kbrock/manageiq,kbrock/manageiq,kbrock/manageiq,jrafanie/manageiq