fix HOME_DIR and OS_NAME order in common scripts (chef#1626)

Signed-off-by: Corey Hemminger <hemminger@hotmail.com>

Author: Stromweld

packer_templates/scripts/_common/guest_tools_parallels.sh

@@ -1,12 +1,12 @@
 #!/bin/sh -eux
 
 # set a default HOME_DIR environment variable if not set
+OS_NAME=$(uname -s)
 if [ "$OS_NAME" = "Darwin" ]; then
   HOME_DIR="/Users/vagrant"
 else
   HOME_DIR="${HOME_DIR:-/home/vagrant}"
 fi
-OS_NAME=$(uname -s)
 
 case "$PACKER_BUILDER_TYPE" in
 parallels-iso|parallels-pvm|parallels-ipsw)

packer_templates/scripts/_common/guest_tools_virtualbox.sh

@@ -1,12 +1,12 @@
 #!/bin/sh -eux
 
 # set a default HOME_DIR environment variable if not set
+OS_NAME=$(uname -s)
 if [ "$OS_NAME" = "Darwin" ]; then
   HOME_DIR="/Users/vagrant"
 else
   HOME_DIR="${HOME_DIR:-/home/vagrant}"
 fi
-OS_NAME=$(uname -s)
 
 case "$PACKER_BUILDER_TYPE" in
 virtualbox-iso|virtualbox-ovf)

packer_templates/scripts/_common/guest_tools_vmware.sh

@@ -1,8 +1,12 @@
 #!/bin/bash -eux
 
 # set a default HOME_DIR environment variable if not set
-HOME_DIR="${HOME_DIR:-/home/vagrant}"
 OS_NAME=$(uname -s)
+if [ "$OS_NAME" = "Darwin" ]; then
+  HOME_DIR="/Users/vagrant"
+else
+  HOME_DIR="${HOME_DIR:-/home/vagrant}"
+fi
 
 case "$PACKER_BUILDER_TYPE" in
 vmware-iso|vmware-vmx)