Adds processLogging phase to regression tests

Regression tests was not processing the 'LoggingPhase'. It was stopping in the
'ResponseBodyPhase'. As we are implementing the AuditLogs this phase is now
mandatory.

test/regression/regression.cc

@@ -136,6 +136,8 @@ void perform_unit_test(std::vector<RegressionTest *> *tests,
             goto end;
         }
 
+        modsec_assay->processLogging();
+
 end:
         CustomDebugLog *d = reinterpret_cast<CustomDebugLog *>
             (modsec_rules->debug_log);