Move debian dir to the master

Add debian dir to combine building workflow

Change-Id: I1cf3361a17a3669c95da9edfe7c8412521b2b6c4
PROD: https://mirantis.jira.com/browse/PROD-20910
diff --git a/debian/gbp.conf b/debian/gbp.conf
new file mode 100644
index 0000000..7bf5959
--- /dev/null
+++ b/debian/gbp.conf
@@ -0,0 +1,8 @@
+[DEFAULT]
+upstream-branch = master
+debian-branch = debian/unstable
+upstream-tag = %(version)s
+compression = xz
+
+[buildpackage]
+export-dir = ../build-area/