## Description of problem:

I'm upgrading my HE environment from 3.6 to 4.0, and 'hosted-engine --upgrade-appliance' fails when trying to reload the database backup I have taken.

## Version-Release number of selected component (if applicable):

ovirt-hosted-engine-ha-2.0.4-1.el7ev.noarch
ovirt-hosted-engine-setup-2.0.2.2-2.el7ev.noarch
rhvh-4.0-0.20161012.0

## How reproducible:

Twice now

## Steps to Reproduce:
1. Install 3.6 environment
2. upgrade first hypervisor with 4.0 image
3. run 'hosted-engine --upgrade-appliance' as per instructions

## Actual results:

Fails with the error message:

[ INFO  ] Found an OVF for HE VM, trying to convert
[ INFO  ] Got vm.conf from OVF_STORE
[ INFO  ] Running engine-setup on the appliance
          |- FATAL: /tmp/engine_backup.tar.gz does not exist
          |- HE_APPLIANCE_ENGINE_RESTORE_FAIL

## Expected results:

The backup seems to be copied over to /root:

[root@rhevmhe1 ~]# ll /root/engine_backup.tar.gz 
-rw-r--r--. 1 root root 1097808 Nov  8 00:03 /root/engine_backup.tar.gz

It should copy it over to /tmp, or try and read it from /root

## Additional info:

To verify the ova, i had to create a temporary filesystem and use that, as upgrading RHVH leaves me with no filesystems with the required capacity (50GB)

Filesystem                                                   Size  Used Avail Use% Mounted on
/dev/mapper/rhvh_intelh5-rhvh--4.0--0.20161012.0+1           3.8G  2.9G  987M  75% /
devtmpfs                                                     5.8G     0  5.8G   0% /dev
tmpfs                                                        5.8G  4.0K  5.8G   1% /dev/shm
tmpfs                                                        5.8G   73M  5.8G   2% /run
tmpfs                                                        5.8G     0  5.8G   0% /sys/fs/cgroup
/dev/mapper/rhvh_intelh5-var                                  15G  761M   15G   5% /var
/dev/mapper/WDC_WD1001FAES-75W7A0_WD-WCATR3546032p1          976M  207M  703M  23% /boot
tmpfs                                                        1.2G     0  1.2G   0% /run/user/0
/dev/mapper/7a4132e5--f66d--4473--881a--a62de7bf3035-master  976M  1.3M  924M   1% /rhev/data-center/mnt/blockSD/7a4132e5-f66d-4473-881a-a62de7bf3035/master
/dev/mapper/rhvh_intelh5-mytmp                                55G   33M   55G   1% /var/tmp2