Renamed promise type to appstreams

Author: nickanderson

cfbs.json

@@ -223,12 +223,12 @@
         "append enable.cf services/init.cf"
       ]
     },
-    "promise-type-dnf_appstream": {
-      "description": "Promise type to manage dnf appstream modules.",
-      "subdirectory": "promise-types/dnf_appstream",
+    "promise-type-appstreams": {
+      "description": "Promise type to manage AppStream modules.",
+      "subdirectory": "promise-types/appstreams",
       "dependencies": ["library-for-promise-types-in-python"],
       "steps": [
-        "copy dnf_appstream.py modules/promises/",
+        "copy appstreams.py modules/promises/",
         "append init.cf services/init.cf"
       ]
     },