common: keep /dev mounted for yum
common: keep /dev mounted for yum

yum which called by clear_packages_cache() depends on /dev to do the
package clean up.
That's why we must call call clean_mount_points() after clear_packages_cache()

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