Adds AuditLog class

The properties related to the Audit Log were saved into the classes
Rules and Dirver, now all those properties will be saved into the
AuditLog class.

src/parser/driver.cc

@@ -18,7 +18,9 @@
 #include "parser/seclang-parser.hh"
 
 Driver::Driver()
-  : trace_scanning(false), trace_parsing(false) {
+  : trace_scanning(false),
+  trace_parsing(false),
+  audit_log(new ModSecurity::AuditLog()) {
 }
 
 
@@ -46,6 +48,11 @@ int Driver::parse(const std::string &f) {
 
     int res = parser.parse();
 
+    if (this->audit_log->init() == false)
+    {
+        return false;
+    }
+
     scan_end();
     return res;
 }