[ReleasePR sdk/cdn/mgmt-v2020_04_15] Update CDN default api version to 2020-04-15.#13021

openapi-sdkautomation[bot] wants to merge 1 commit intoAzure:masterAzure/azure-sdk-for-java:masterfrom

AzureSDKAutomation:sdkAutomation/sdk_cdn_mgmt-v2020_04_15AzureSDKAutomation/azure-sdk-for-java:sdkAutomation/sdk_cdn_mgmt-v2020_04_15Copy head branch name to clipboard