Add CDN Service - aws cloud front

[dilantha111]

This is a Feature Proposal

Description

*Supporting for CDN services. aws cloud front. ex :- create distributions , create invalidations. For an example CDN invalidations specially helpful when sdk is used with continuous delivery

[rehrumesh]

Give more information about the public interfaces you are planning to implement

[rajikaimal]

@dilantha111 it would be great if you can compare this service with the equivalents of other cloud providers before implementation.

[dilantha111]

Of course @rehrumesh and @rajikaimal Thanks for the heads up.

NodeCloud interface	aws	gcp
cloud cdn distribution	cloud front distribution	cloud cdn
cloud cdn invalidation	cloud front invalidation	cloud cdn invalidation

so the common interface would be like follows :

cloud cdn distribution	cloud cdn invalidation
createDistribution	createInvalidation
listDistributions	listInvalidations
deleteDistribution
updateDistribution