Description of problem:
The deploy of the HE fails on first attempt with
[ ERROR ] Failed to execute stage 'Misc Configuration' : Connection to storage server failed.
The local server is used as NFS,all the permissions and ownerships are set correctly.
RHV_STORAGE/DATA_DOMAIN
                <world>(rw,async,wdelay,root_squash,no_subtree_check,sec=sys,rw,secure,root_squash,no_all_squash)
/RHV_STORAGE/RHVM_DATA
                <world>(rw,async,wdelay,root_squash,no_subtree_check,sec=sys,rw,secure,root_squash,no_all_squash)

Once the deployment fails and it's redeployed again for the second time, it will get deployed successfully without any issue. 

Version-Release number of selected component (if applicable):
RHEL 7.3 and 7.4

How reproducible:
100% in user env

Actual results:
StorageServerAccessPermissionError: Permission settings on the specified path do not allow access to the storage. Verify permission settings on the specified storage path.: 'path = /rhev/data-center/mnt/_var_lib_ovirt-hosted-engine-setup_tmpdjRwix'


Additional info:
We added debug line to the code and this is the result, as uid,guid is root:root instead of vdsm:kvm 
MainProcess|jsonrpc/7::DEBUG::2017-08-07 18:58:17,432::supervdsmServer::93::SuperVdsm.ServerCallback::(wrapper) call validateAccess with ('vdsm', ('kvm',), '/rhev/data-center/mnt/_var_lib_ovirt-hosted-engine-setup_tmpadUXrT', 7) {}

MainProcess|jsonrpc/7::DEBUG::2017-08-07 18:58:17,436::fileUtils::138::storage.fileUtils::(validateAccess) Permissions for directory '/rhev/data-center/mnt/_var_lib_ovirt-hosted-engine-setup_tmpadUXrT' are '0755', stat output is 'posix.stat_result(st_mode=16877, st_ino=2, st_dev=1793L, st_nlink=3, st_uid=0, st_gid=0, st_size=4096, st_atime=1502112496, st_mtime=1502112496, st_ctime=1502112496)'

MainProcess|jsonrpc/7::WARNING::2017-08-07 18:58:17,436::fileUtils::141::storage.fileUtils::(validateAccess) Permission denied for directory: /rhev/data-center/mnt/_var_lib_ovirt-hosted-engine-setup_tmpadUXrT with permissions: 7

Permissions during deploy
/var/lib/ovirt-hosted-engine-setup/:
drwxr-xr-x root root ?                                ..
drwxr-xr-x root root ?                                .
drwxr-xr-x root root ?                                answers
-rw------- vdsm kvm  ?                                tmp9SjQGH

/rhev/data-center/mnt:
drwxr-xr-x vdsm kvm ?                                ..
drwxrwxrwx vdsm kvm ?                                10.53.197.129:_RHV__STORAGE_RHVM__DATA
drwxr-xr-x vdsm kvm ?                                .