Put path back to playbook_dir for common template
Put path back to playbook_dir for common template

The config template is in ceph-common, not in the individual roles, so
roles referencing it need to use playbook_dir, not role_path.

Signed-off-by: Daniel Gryniewicz <7c160e8c60410b4d08316c6a35517f4728ce4edb@redhat.com>

font/ceph-ansible,font/ceph-ansible,albertomurillo/ceph-ansible,verdurin/ceph-ansible-1,WingkaiHo/ceph-ansible,guits/ceph-ansible,albertomurillo/ceph-ansible,jsaintrocc/ceph-ansible,fgal/ceph-ansible,guits/ceph-ansible,travmi/ceph-ansible,ceph/ceph-ansible,travmi/ceph-ansible,fgal/ceph-ansible,WingkaiHo/ceph-ansible,jtaleric/ceph-ansible,verdurin/ceph-ansible-1,mcsage/ceph-ansible,WingkaiHo/ceph-ansible,bengland2/ceph-ansible,ceph/ceph-ansible,jtaleric/ceph-ansible,mcsage/ceph-ansible,albertomurillo/ceph-ansible,bengland2/ceph-ansible,jsaintrocc/ceph-ansible