Don't mix declaration and set of locals

Ia0957b47187c3dcadd46154b17022c4213781112 proposes to have bashate
find instances of setting a local value.  The issue is that "local"
always returns 0, thus hiding any failure in the commands running to
set the variable.

This is an automated replacement of such instances

Depends-On: I676c805e8f0401f75cc5367eee83b3d880cdef81
Change-Id: I9c8912a8fd596535589b207d7fc553b9d951d3fe
diff --git a/lib/lvm b/lib/lvm
index 8afd543..468a99a 100644
--- a/lib/lvm
+++ b/lib/lvm
@@ -56,7 +56,8 @@
 
     # If the backing physical device is a loop device, it was probably setup by DevStack
     if [[ -n "$backing_file" ]] && [[ -e "$backing_file" ]]; then
-        local vg_dev=$(sudo losetup -j $backing_file | awk -F':' '/'$BACKING_FILE_SUFFIX'/ { print $1}')
+        local vg_dev
+        vg_dev=$(sudo losetup -j $backing_file | awk -F':' '/'$BACKING_FILE_SUFFIX'/ { print $1}')
         sudo losetup -d $vg_dev
         rm -f $backing_file
     fi
@@ -89,7 +90,8 @@
     if ! sudo vgs $vg; then
         # Only create if the file doesn't already exists
         [[ -f $backing_file ]] || truncate -s $size $backing_file
-        local vg_dev=`sudo losetup -f --show $backing_file`
+        local vg_dev
+        vg_dev=`sudo losetup -f --show $backing_file`
 
         # Only create volume group if it doesn't already exist
         if ! sudo vgs $vg; then