CA-123914: Install update wizard: When applying a patch to multiple pools, the "revert prechecks" action should be executed only once, after the patch is applied to all pools.

Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>
Merge pull request #16 from MihaelaStoica/master

CA-123914: Install update wizard: When applying a patch to multiple pool...