Revert "create partition for lvm volume"

This reverts commit 034189ec04.

This change was made with the justification that it would make
cinder use "a bit more optimized" and that it "may impact reliability
for good".  There was a link in a review comment to a bug that did
not appear to have any relevance.

In short, this change added both complexity and essentially a test
environment requirement for a second volume.  Perhaps we need that,
but if we are going to establish that as a requirement, we should
have some evidence to back up the performance claims.

Change-Id: I541a66d81fab5be65bb9cd6684e00aa85c3283a9

functions.sh

@@ -301,16 +301,14 @@ function fix_disk_layout {
             fi
             sudo parted ${DEV} --script -- mklabel msdos
             sudo parted ${DEV} --script -- mkpart primary linux-swap 1 8192
-            sudo parted ${DEV} --script -- mkpart primary ext2 8192 32768
-            sudo parted ${DEV} --script -- mkpart primary ext2 32768 -1
-            sudo mkswap $swap
-            sudo vgcreate stack-volumes-lvmdriver-1 $lvmvol
-            sudo mkfs.ext4 $optdev
-            sudo swapon $swap
-            sudo mount $optdev /mnt
+            sudo parted ${DEV} --script -- mkpart primary ext2 8192 -1
+            sudo mkswap ${DEV}1
+            sudo mkfs.ext4 ${DEV}2
+            sudo swapon ${DEV}1
+            sudo mount ${DEV}2 /mnt
             sudo find /opt/ -mindepth 1 -maxdepth 1 -exec mv {} /mnt/ \;
             sudo umount /mnt
-            sudo mount $optdev /opt
+            sudo mount ${DEV}2 /opt
         fi
     fi