Improve testing framework

Replaced Criterrion with CMock. Added few tests, currently not working
properly. Random test upgrades.

utilities/src/logger.c

@@ -5,10 +5,19 @@ const char* log_levels[] = {
     "[TRACE]", "[DEBUG]", "[INFO]", "WARNING", "[ERROR]", "[FATAL]"
     };
 
+#ifndef LOGLEVEL
+#define LOGLEVEL LOGLEVEL_DEBUG
+#endif
+
 void _log_log(unsigned int level, const char* file, int line, const char* fmt, ...)
 {
     va_list list;
 
+    if (level < LOGLEVEL)
+    {
+        return;
+    }
+
     va_start(list, fmt);
     fprintf(stdout, "%s %s:%d: ", log_levels[level], file, line);
     vfprintf(stdout, fmt, list);