This patch adds a test for cloning with KAS_REPO_REF_DIR.
It explicitly tests the case that two repos with a single upstream URI
are added and also tests mercurial.
Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
[Jan: ensure Python 3.5 compatibility]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>