tests: move sysrepo helpers into a separate library

Change-Id: I0fec15a712f33647b546c98ff9ce4793090b6aa5
diff --git a/tests/sysrepo_two-daemons.cpp b/tests/sysrepo_two-daemons.cpp
index fc21867..1a03d85 100644
--- a/tests/sysrepo_two-daemons.cpp
+++ b/tests/sysrepo_two-daemons.cpp
@@ -1,7 +1,7 @@
 #include "trompeloeil_doctest.h"
 #include "pretty_printers.h"
 #include "test_log_setup.h"
-#include "test_sysrepo_helpers.h"
+#include "tests/sysrepo-helpers/common.h"
 
 /* This is a generic test for the following use-case in the ietf-hardware model
  *  - Process #1 starts and uses sr_set_item to set some data in the "/ietf-hardware:hardware/component" subtree