mountsources default value for containers

[gorkem]

The default value for for mountsources should be true for all component types except for the plugin type.

[l0rd]

That's a good point because on the other end we have discussed and agreed that the default value for dedicatedPod should be true. But dedicatedPod: true is compatible with mountsources: true only if the storage backend supports RWX OR if we use rsync to sync sources amongst pods.

[gorkem]

I see the point. Perhaps we should just state that if not explicitly defined all components will mountsources except plugin types and those that have dedicatedPod set to be true. This will cover most of the cases.

[johnmcollier]

Closed in #145