base: Don't search debootstrap for all distro
base: Don't search debootstrap for all distro

If you aims at building rpm based roles, there is no need to check if
debootstrap is installed.

This is a remain of the legacy code when it was deb specific. Since we
can also build rpm-based distro, let's only check for debootstrap when
considering the .deb case.

redhat-cip/edeploy,enovance/edeploy,lebauce/edeploy,lebauce/edeploy,enovance/edeploy,redhat-cip/edeploy,enovance/edeploy,lebauce/edeploy,redhat-cip/edeploy,enovance/edeploy,lebauce/edeploy,redhat-cip/edeploy