Romain dartigues fixes (#29169)

* cloud: azure: fix typo introduced in commit 16d23e9

The commit "Add reference to VNET resource group (#26052)"
removed an used variable.

* network: aos: error hint never shown

(cherry picked from commit 6797221107)

lib/ansible/modules/cloud/azure/azure_rm_virtualmachine.py

@@ -1431,7 +1431,7 @@ class AzureRMVirtualMachine(AzureRMModuleBase):
             try:
                 self.network_client.virtual_networks.list(virtual_network_resource_group, self.virtual_network_name)
                 virtual_network_name = self.virtual_network_name
-            except CloudError:
+            except CloudError as exc:
                 self.fail("Error: fetching virtual network {0} - {1}".format(self.virtual_network_name, str(exc)))
 
         else:

lib/ansible/modules/network/aos/aos_blueprint.py

@@ -150,12 +150,11 @@ def create_blueprint(module, aos, name):
 
     except:
         exc = get_exception()
+        msg = "Unable to create blueprint: %s" % exc.message
         if 'UNPROCESSABLE ENTITY' in exc.message:
-            msg = 'likely missing dependencies'
-        else:
-            msg = exc.message
+            msg+= ' (likely missing dependencies)'
 
-        module.fail_json(msg="Unable to create blueprint: %s" % exc.message)
+        module.fail_json(msg=msg)
 
     return blueprint