Rename zuul-launcher to zuul-executor

To avoid confusion with nodepool-launcher, we've decided to rename
zuul-launcher to zuul-executor.

Change-Id: I7d03cf0f0093400f4ba2e4beb1c92694224a3e8c
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
diff --git a/playbooks/base-post.yaml b/playbooks/base-post.yaml
index 2b3450d..ed3f7b8 100644
--- a/playbooks/base-post.yaml
+++ b/playbooks/base-post.yaml
@@ -2,12 +2,12 @@
   tasks:
     - name: Collect console log.
       synchronize:
-        dest: "{{ zuul.launcher.log_root }}"
+        dest: "{{ zuul.executor.log_root }}"
         mode: pull
         src: "/tmp/console.log"
 
     - name: Publish logs.
       copy:
         dest: "/opt/zuul-logs/{{ zuul.uuid}}"
-        src: "{{ zuul.launcher.log_root }}/"
+        src: "{{ zuul.executor.log_root }}/"
       delegate_to: 127.0.0.1