Update the way of loading the admin-openrc.sh file

TrivialFix

Change-Id: I3cfa94d9f6202664a06c24d691376eb8759b922a

doc/vagrant-dev-env.rst

@@ -149,7 +149,7 @@ On Ubuntu 14.04 or later::
 Validate OpenStack is operational::
 
     kolla-ansible post-deploy
-    source /etc/kolla/admin-openrc.sh
+    . /etc/kolla/admin-openrc.sh
     openstack user list
 
 Or navigate to http://172.28.128.254/ with a web browser.

tools/deploy_aio.sh

@@ -29,7 +29,7 @@ function copy_logs {
 function sanity_check {
     # Wait for service ready
     sleep 15
-    source /etc/kolla/admin-openrc.sh
+    . /etc/kolla/admin-openrc.sh
     # TODO(Jeffrey4l): Restart the memcached container to cleanup all cache.
     # Remove this after this bug is fixed
     # https://bugs.launchpad.net/oslo.cache/+bug/1590779