Add basic awareness of namespaces to the database. As part of
this, add constraints so containers can only be added to pods in
the same namespace.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
This ensures we don't open a DB with an earlier schema or a
config that differs from ours
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #86
Approved by: rhatdan