Fix growpart error when missing.

If the virtual machine don't have cloud-utils intalled this script print errors.
I test if growpart command is available before running the action

base/etc/one-context.d/07-grow-rootfs

@@ -1,29 +1,34 @@
 #!/bin/bash
 
-MOUNT_LINE=$(cat /etc/mtab | grep ' / ' | grep -v '^rootfs')
+GROWPART=$(which growpart)
+if [[ ${?} -ne 0 ]]
+then
+  echo "Skipping growfs, growpart command is missing"
+else
+  MOUNT_LINE=$(cat /etc/mtab | grep ' / ' | grep -v '^rootfs')
 
-DEVICE=$(echo "$MOUNT_LINE" | cut -d' ' -f1)
-DEVICE=$(readlink -f "$DEVICE")
-FSTYPE=$(echo "$MOUNT_LINE" | cut -d' ' -f3)
+  DEVICE=$(echo "$MOUNT_LINE" | cut -d' ' -f1)
+  DEVICE=$(readlink -f "$DEVICE")
+  FSTYPE=$(echo "$MOUNT_LINE" | cut -d' ' -f3)
 
-DISK=$(echo "$DEVICE" | sed 's/.$//')
-PARTITION=$(echo "$DEVICE" | sed "s|^$DISK||")
+  DISK=$(echo "$DEVICE" | sed 's/.$//')
+  PARTITION=$(echo "$DEVICE" | sed "s|^$DISK||")
 
-if [ -n $DEBUG ]; then
+  if [ -n $DEBUG ]; then
     echo DEVICE: $DEVICE
     echo FSTYPE: $FSTYPE
     echo DISK: $DISK
     echo PARTITION: $PARTITION
-fi
-
-growpart "$DISK" "$PARTITION"
+  fi
 
-case "$FSTYPE" in
-ext2|ext3|ext4)
-    resize2fs "$DEVICE"
-    ;;
-xfs)
-    xfs_growfs /
-    ;;
-esac
+  growpart "$DISK" "$PARTITION"
 
+  case "$FSTYPE" in
+    ext2|ext3|ext4)
+      resize2fs "$DEVICE"
+      ;;
+    xfs)
+      xfs_growfs /
+      ;;
+  esac
+fi