Add source openrc

Signed-off-by: Arnaud Morin <arnaud.morin@ovhcloud.com>

cloud/training/101.md

@@ -31,6 +31,13 @@ pip install --upgrade pip
 pip install python-openstackclient
 ```
 
+## Load your openstack credentials
+
+Load in your shell the variables that permit to talk with your openstack
+```
+source openrc_isenx   # replace x with your isen number
+```
+
 ## Instance
 This part will help you manage some compute resources of the cloud.