Backport-525-to-0.8 (#532)

[MOD-7474] fix valgrind on linux x86 (#525)

* add --fair-sched=yes flag to valgrind

* fix test

*  print neighbours if got unexpected ids. fail the test only after all the result's id's have been checked.

(cherry picked from commit a2478ef)

Author: meiravgri

Makefile

@@ -176,7 +176,7 @@ endif
 ifeq ($(VALGRIND),1)
 _CTEST_ARGS += \
 	-T memcheck \
-	--overwrite MemoryCheckCommandOptions="--leak-check=full --error-exitcode=255"
+	--overwrite MemoryCheckCommandOptions="--leak-check=full --fair-sched=yes --error-exitcode=255"
 endif
 
 unit_test: