Update mixed and yaml_git for node name changes introduced with compose_node_name option

This fixes method signatures in mixed and yaml_git to match
the changes in yaml_fs. The mixed storage type just passes on the new
compose_node_name option which will work correctly. However for the
yaml_git storage type the compose_node_name=true option has not been
tested only the old functionality which corresponds to
compose_node_name=false has been tested.
4 files changed