bug #2128: datastore file scripts are not executed in context

init scripts execution is moved to an external one-context.d script.
Now there is a new context variable (INIT_SCRIPTS) with the list of
files to execute from context.

share/scripts/context-packages/base/etc/init.d/vmcontext

@@ -60,9 +60,6 @@ if [ -e "$CDROM_DEVICE" ]; then
 
     execute_scripts
 
-    if [ -f /mnt/init.sh ]; then
-        /mnt/init.sh
-    fi
     umount /mnt
 else
     execute_scripts

share/scripts/context-packages/base/etc/one-context.d/99-execute-scripts

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+MOUNT_DIR=/mnt
+TMP_DIR=/tmp/one-context-tmp
+
+if [ -z "$INIT_SCRIPTS" ]; then
+    if [ -f "$MOUNT_DIR/init.sh" ]; then
+        INIT_SCRIPTS=init.sh
+    fi
+fi
+
+mkdir -p $TMP_DIR
+cd $MOUNT_DIR
+
+for f in $INIT_SCRIPTS; do
+    cp $f $TMP_DIR
+    chmod +x $TMP_DIR/$f
+    $TMP_DIR/$f
+done
+