Add support for Azure ARM templates in launch configs

They don't include location on top level, but as parameters of the
template

Author: lotas

tcadmin/resources/worker_pool.py

@@ -32,6 +32,8 @@ def sort_key(lc):
                 return lc["zone"]  # gcp
             if "location" in lc:
                 return lc["location"]  # azure
+            if "armDeployment" in lc:
+                return lc["armDeployment"]["parameters"]["location"]["value"]  # azure ARM templates
             if "region" in lc:
                 return lc["region"]  # aws