Refactoring on `utils.cc' and adjacents

Completely removed the `utils.cc' by moving residual functions into
sub-classes of `utils/'

src/utils/random.cc

@@ -0,0 +1,45 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+
+#include <algorithm>
+#include <random>
+#include <memory>
+#include <functional>
+#include <string>
+
+#include "modsecurity/modsecurity.h"
+
+namespace modsecurity {
+namespace utils {
+
+
+double random_number(const double from, const double to) {
+    std::random_device rd;
+    std::mt19937 mt(rd());
+    return std::bind(
+        std::uniform_real_distribution<>{from, to},
+        std::default_random_engine{ mt() })();
+}
+
+
+double generate_transaction_unique_id() {
+    return random_number(0, 100);
+}
+
+
+}  // namespace utils
+}  // namespace modsecurity
+