Implement ansible support for RH

This fix install-server build using this command:
make VERS=C6.5-I.1.2.0 BVERS=C6.5-I.1.2.0  DVER=C6.5 DIST=centos PVER=I SF_REL=0.9.1 EDEPLOY_PATH=/var/lib/sf/git/edeploy-master/ TOP=/var/lib/sf/roles CODENAME_MAJOR=6 install-server
yet it fixed the install-server role building, else I get "yum is not available, please use blabla", be it with install_packages directive or using do_chroot