MT#8919 Depend on fai-setup-storage >=4.2.4+0 to fix parted issue

We've the fai-setup-storage Debian package in our wheezy-backports
repository (taken from http://jenkins.grml.org/job/fai-binaries/architecture=amd64/184/)
which includes the bugfix 5160db7031
to address the failing execution on empty disk(s) with parted >=3.*.

Change-Id: I3400aa1cd80dc356dbd92767756dc43c596ed138

deployment.sh

@@ -139,7 +139,7 @@ loadNfsIpArray() {
 fai_upgrade() {
   upgrade=false # upgrade only if needed
 
-  local required_version=4.2
+  local required_version=4.2.4+0
   local present_version=$(dpkg-query --show --showformat='${Version}' fai-setup-storage)
 
   if dpkg --compare-versions $present_version lt $required_version ; then