add default implementation for IGloballyAddressable

[Huandao0812]

Description and related tickets, documents

Reviewers: @phvu @hai-adatao

Breaking changes & backward compatible issues

Is this PR a breaking change or has backward compatible issue (e.g: changes in API names, interfaces, signature / remove something...)? If yes, please state out what and tag, and if it can possibly affect BA, please tag aht, tuananh, khangpham and baonguyen

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[phvu]

I feel this will increase the complexity of the inheritance hierarchy (if we are gonna make other classes inherit GloballyAddressable). Maybe we should add those new functions into AGloballyAddressable instead?

I think one "cleaner" way is to use default methods (http://www.programcreek.com/2014/12/default-methods-in-java-8-and-multiple-inheritance/) to implement getGlobalObjectType and getUri directly in IGloballyAddressable, and other things like UUID, name and namespace will be handled in AGloballyAddressable.

[Huandao0812]

@phvu fixed

[phvu]

lgtm

[PangZhi]

@Huandao0812 lgtm