Use userrc_early for all nodes

Instead of only using the userrc_early when keystone
is an enabled service we will do it on all runs of
stack.sh. This way services can be split up more
across devstack nodes, and you can do configuration
requiring credentials on nodes that don't install
keystone.

Change-Id: I74574ae9f45a74bcbcc8e3149228ecb795ab4fb7

stack.sh

@@ -1021,15 +1021,6 @@ start_dstat
 # Keystone
 # --------
 
-if is_service_enabled keystone; then
-    echo_summary "Starting Keystone"
-
-    if [ "$KEYSTONE_AUTH_HOST" == "$SERVICE_HOST" ]; then
-        init_keystone
-        start_keystone
-        bootstrap_keystone
-    fi
-
 # Rather than just export these, we write them out to a
 # intermediate userrc file that can also be used to debug if
 # something goes wrong between here and running
@@ -1057,6 +1048,15 @@ EOF
 
 source $TOP_DIR/userrc_early
 
+if is_service_enabled keystone; then
+    echo_summary "Starting Keystone"
+
+    if [ "$KEYSTONE_AUTH_HOST" == "$SERVICE_HOST" ]; then
+        init_keystone
+        start_keystone
+        bootstrap_keystone
+    fi
+
     create_keystone_accounts
     create_nova_accounts
     create_glance_accounts