chore(kong): BindToProvider singletons workaround #589
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BindToProvider in Kong will create new instances of bindings
that come from a provider function every time they're requested
by another binding.
This means that we always re-open some of these resources
multiple times: e.g. repository is opened when requested by state.Store,
by spice.Service, and then by individual commands.
Work around this with a sync.Once until the new
BindSingletonProvider option
is released.