CC-3320: Upgrade from 2.0->2.0.1: Airtime instance is not avaiable for 1~2mins right after upgrade.

-use clearstatcache function

airtime_mvc/public/install/clearstatcache.php

@@ -0,0 +1,6 @@
+<?php
+
+/* The purpose of this file is get PHP to clear its cache regarding the
+ * filesystem layout. See this ticket http://dev.sourcefabric.org/browse/CC-3320 */
+
+clearstatcache(true);

install_minimal/include/airtime-copy-files.sh

@@ -82,6 +82,11 @@ if [ "$web" = "t" ]; then
     rm -rf "/usr/share/airtime"
     mkdir -p /usr/share/airtime
     cp -R $AIRTIMEROOT/airtime_mvc/* /usr/share/airtime/
+    
+    #Clear stat cache, and remove the script after running it.
+    curl http://localhost/install/clearstatcache.php
+    rm -f /usr/share/airtime/public/install/clearstatcache.php
+    rmdir -f /usr/share/airtime/public/install
 fi
 
 echo "* Creating /var/log/airtime"