CodeGen from PR 14935 in Azure/azure-rest-api-specs

[EdgeOrder] Update 2020-12-01-preview swagger and add readme files (Azure#14935)

* new api changes (#1)

* new api changes

* referer url change

* EdgeOrder 2020-12-01-preview Swagger changes (#5)

* readme changes

* Swagger refresh and update examples

* Change examples as per oav validations

* Minor swagger modifications

* Minor spacing adjustments

* Set ModelAsString to true for enums and modify examples

* Fix swagger lint validation error

* Modify readme and examples

* Modify readme.go.md

* Update swagger

* Minor prettier fix

* Change python package version in readme

* Fix spell check error

Co-authored-by: sashanm <54701252+sashanm@users.noreply.github.com>