Replace TENANT => PROJECT phase 1

This replaces the use of TENANT variables with PROJECT ones during the
initial setup. The openrc will still export a OS_TENANT_NAME because
many tools (cinderclient, glanceclient amoung them) will not function
without it. We warn when we do that.

Change-Id: I824b1121842eb5821034071874bf1bb2d7c3631e
diff --git a/lib/cinder b/lib/cinder
index e1e1f2a..6401f2d 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -351,7 +351,7 @@
     # Set os_privileged_user credentials (used for os-assisted-snapshots)
     iniset $CINDER_CONF DEFAULT os_privileged_user_name nova
     iniset $CINDER_CONF DEFAULT os_privileged_user_password "$SERVICE_PASSWORD"
-    iniset $CINDER_CONF DEFAULT os_privileged_user_tenant "$SERVICE_TENANT_NAME"
+    iniset $CINDER_CONF DEFAULT os_privileged_user_tenant "$SERVICE_PROJECT_NAME"
     iniset $CINDER_CONF DEFAULT graceful_shutdown_timeout "$SERVICE_GRACEFUL_SHUTDOWN_TIMEOUT"
 }