XenServer: Fix initramfs scripts

During bashate -ing some files with .sh extension has been modified,
which are interpreted with /bin/sh, which takes a different syntax.
Fixing the issue:
    - rename the files, so they are not picked up
    - use syntax that's understood by sh

Change-Id: I617b24813df86687ca33745d0c940b0c659f2e14

nodepool/scripts/convert_node_to_xenserver.sh

@@ -163,11 +163,11 @@ function get_state {
 }
 
 function create_resizing_initramfs_config {
-    cp "$THIS_DIR/xenserver_helper_initramfs_hook.sh" \
+    cp "$THIS_DIR/xenserver_helper_initramfs_hook" \
         /usr/share/initramfs-tools/hooks/resize
     chmod +x /usr/share/initramfs-tools/hooks/resize
 
-    cp "$THIS_DIR/xenserver_helper_initramfs_premount.sh" \
+    cp "$THIS_DIR/xenserver_helper_initramfs_premount" \
         /usr/share/initramfs-tools/scripts/local-premount/resize
     chmod +x /usr/share/initramfs-tools/scripts/local-premount/resize
 }

nodepool/scripts/xenserver_helper_initramfs_hook

@@ -4,7 +4,7 @@ set -e
 
 PREREQ=""
 
-function prereqs {
+prereqs () {
     echo "${PREREQ}"
 }
 

nodepool/scripts/xenserver_helper_initramfs_premount

@@ -5,7 +5,8 @@ set -ex
 PREREQ=""
 
 # Output pre-requisites
-function prereqs {
+prereqs()
+{
         echo "$PREREQ"
 }