added armbian and os_flavor grain

_grains/os_flavor.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+import re
+import os.path
+
+def _os_flavor():
+
+    if os.path.isfile('/etc/armbian-release'):
+        h = "Armbian"
+    else:
+        h = "Debian"
+    return h
+
+def main():
+    grains = {}
+    grains['os_flavor'] = _hardware()
+    return grains