cloner to easily clone dependent repositories

The intent is to replace the devstack shell script with a python utility
which would be easy to reuse.

Change-Id: I3c8748e2544af80e72fdd0b2e3627b4fc2212c01
diff --git a/tests/fixtures/clonemap.yaml b/tests/fixtures/clonemap.yaml
new file mode 100644
index 0000000..0f9e084
--- /dev/null
+++ b/tests/fixtures/clonemap.yaml
@@ -0,0 +1,5 @@
+clonemap:
+ - name: 'mediawiki/core'
+   dest: '.'
+ - name: 'mediawiki/extensions/(.*)'
+   dest: '\1'