Added promise definition

Author: nickanderson

cfbs.json

@@ -229,7 +229,7 @@
       "dependencies": ["library-for-promise-types-in-python"],
       "steps": [
         "copy dnf_appstream.py modules/promises/",
-        "append enable.cf services/init.cf"
+        "append init.cf services/init.cf"
       ]
     },
     "promise-type-git": {

promise-types/dnf_appstream/init.cf

@@ -0,0 +1,6 @@
+promise agent dnf_appstream
+# @brief Define dnf_appstream promise type
+{
+        path => "$(sys.workdir)/modules/promises/dnf_appstream.py";
+        interpreter => "/usr/bin/python3";
+}