Justin Cormack 4434ecc4af Support multiple CDROMS in metadata ...

This checks if any CDROM in the system has metadata. Useful if
you boot off CDROM and also have a metadata CDROM.

Also switch the metadata container to read only, as it is only
writing to bind mounted in directories, and /tmp.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

2017-08-03 14:16:02 +01:00

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