Update metadata.yaml to support MOS 9.0
Update metadata.yaml to support MOS 9.0

This change adds support for both liberty-9.0 and mitaka-9.0 releases.
Eventually liberty-9.0 can be removed once [1] gets merged.

[1] I92fb23d65fce8253d3da3f7352b8428a5e9a98f2

Change-Id: I7622a902e59604bb20890ff82be2bdceb255c4a1

stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector