dovetail: fix wipe workspace error

JIRA: DOVETAIL-377

workspace wipe clean error log
https://build.opnfv.org/ci/job/dovetail-compass-virtual-debug-master/365/console
this is caused of wrong permissions with files under $WORKSPACE

seems the former method in dovetail-run not take effects(log into host, it's still root:root,
not $USER:$USER_GROUP)

use global fix workspace permission in wrapper to replace former method

Change-Id: I6ceaaf630590666f3b3db5f2628334879df2b8fb
Signed-off-by: MatthewLi <matthew.lijun@huawei.com>