Always log locally during test run

.gitignore

@@ -12,3 +12,4 @@ composer.phar
 /tests/results.html
 /tests/*.jar
 VERSION
+airtime_mvc/tests/log/*.log

airtime_mvc/tests/phpunit.xml

@@ -18,6 +18,7 @@
         <env name="ENVIRONMENT" value="testing"/>
         <env name="AIRTIME_UNIT_TEST" value="1"/>
         <env name="LIBRETIME_CONF_DIR" value="./conf"/>
+        <env name="LIBRETIME_LOG_DIR" value="./log"/>
     </php>
 
     <!-- Disabling broken code coverage report. It's not using our autoloader for some reason...