Adapt to a breakage revert in upstream libyang

The identity values are now once again prefixed.

This (partially) reverts commit
315838ea5f0efeba4d68647ff612fc4141eb1190.

Depends-on: https://gerrit.cesnet.cz/c/CzechLight/dependencies/+/6490
Change-Id: I1b1bc3381c36d47d7ebdc5cdf6aa65cb1711c6fe
diff --git a/tests/sysrepo_interfaces-libnl.cpp b/tests/sysrepo_interfaces-libnl.cpp
index a5e26f6..754ef42 100644
--- a/tests/sysrepo_interfaces-libnl.cpp
+++ b/tests/sysrepo_interfaces-libnl.cpp
@@ -269,13 +269,13 @@
             auto routeIdx = findRouteIndex("198.51.100.0/24");
             REQUIRE(routeIdx > 0);
             REQUIRE(data["/routes/route["s + std::to_string(routeIdx) + "]/next-hop/outgoing-interface"] == IFACE);
-            REQUIRE(data["/routes/route["s + std::to_string(routeIdx) + "]/source-protocol"] == "static");
+            REQUIRE(data["/routes/route["s + std::to_string(routeIdx) + "]/source-protocol"] == "ietf-routing:static");
         }
         {
             auto routeIdx = findRouteIndex("192.0.2.0/24");
             REQUIRE(routeIdx > 0);
             REQUIRE(data["/routes/route["s + std::to_string(routeIdx) + "]/next-hop/outgoing-interface"] == IFACE);
-            REQUIRE(data["/routes/route["s + std::to_string(routeIdx) + "]/source-protocol"] == "direct");
+            REQUIRE(data["/routes/route["s + std::to_string(routeIdx) + "]/source-protocol"] == "ietf-routing:direct");
         }
 
         data = dataFromSysrepo(client, "/ietf-routing:routing/ribs/rib[name='ipv6-master']", sysrepo::Datastore::Operational);