[ARM] China regions can not be used

Right now some paths are hardcoded, so azure compute provider cannot work correctly, this one was the main blocker:

https://github.com/jclouds/jclouds/blob/master/providers/azurecompute-arm/src/main/java/org/jclouds/azurecompute/arm/config/AzureComputeHttpApiModule.java#L57

As a reference, here is a documentation for the needed endpoint translations when using Azure regions in China https://docs.microsoft.com/en-us/azure/china/china-get-started-developer-guide#check-endpoints-in-azure

Also some tests included configurations, regions and paths hardcoded that made it hard to test, i might open an alternate PR just to fix those tests executions.

In a local branch overriding all those problems i could execute the full set of Live Tests with just two outstanding problems (maybe as different isolated issues):

• GraphAPI endpoint is hardcoded here https://github.com/jclouds/jclouds/blob/master/providers/azurecompute-arm/src/main/java/org/jclouds/azurecompute/arm/config/GraphRBAC.java#L38
• VaultAPI endpoints are also hardcoded https://github.com/jclouds/jclouds/blob/master/providers/azurecompute-arm/src/main/java/org/jclouds/azurecompute/arm/features/VaultApi.java#L149

 I will open a PR to fix those paths and allow the provider to work with China regions, as well as adding two missing regions.