Change type of cells.deleted from boolean to integer.

Fixes bug #1168490

Migration 152 changed other tables' deleted column from boolean
to integer, but cells got missed.  SQLite and MySQL are weakly-
typed enough that mixing integers and booleans is allowed, but
PostgreSQL is not, and this causes an error.

Migration 179 is a copy of migration 152, except applied only to
the cells table.

Change-Id: I85c39765edc206d38d21827ab54e1371155b9557
Fixes typo in server-evacuate-req.xml

The element name should be evacuate instead of rescue
Fixes bug 1178280

Change-Id: I3eed81c01cb9948c978f405bb3b2748e1094d488
xenapi: cleanup vdi when disk too big exception raised

In addition add some unit tests to that area of the code.

fixes bug 1015423

Change-Id: If33cbb395bc39cbb6e8b2ecbd2d6ad3a26b6b301
Add pointer to compute driver matrix wiki page.

Change-Id: I20a6cfdfaf1b03d6a0d9b793534a4f07f99e9ae1
Merge "Fixes typo in server-evacuate-req.xml"
Merge "Change type of cells.deleted from boolean to integer."
Merge "Add pointer to compute driver matrix wiki page."
Merge "xenapi: cleanup vdi when disk too big exception raised"