Change run to wait, to run only on repositories changes

apt/dist_upgrade.sls

@@ -1,4 +1,5 @@
 apt-get dist-upgrade:
-  cmd:
-    - run
-
+  cmd.wait:
+    - watch:
+      - file: /etc/apt/sources.list
+      - file: /etc/apt/sources.list.d

apt/update.sls

@@ -1,3 +1,5 @@
 apt-get update:
-  cmd:
-    - run
+  cmd.wait:
+    - watch:
+      - file: /etc/apt/sources.list
+      - file: /etc/apt/sources.list.d