build/edeploy: don't fail if PROFIL is not set
build/edeploy: don't fail if PROFIL is not set

When booting an image directly from LXC or OpenStack Heat, there is no
hardware discovery and configuration so there is no need to set PROFILE
argument.

Close #171

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