Comment 7 for bug 1547379

Noticed similar issue on Ubuntu VM

++lib/tempest:install_tempest:598 /opt/stack/tempest/.tox/tempest/bin/pip install -c /opt/stack/requirements/upper-constraints.txt -r requirements.txt
/home/ubuntu/devstack/lib/tempest: line 598: /opt/stack/tempest/.tox/tempest/bin/pip: No such file or directory
+lib/tempest:install_tempest:1 exit_trap
+./stack.sh:exit_trap:473 local r=1
++./stack.sh:exit_trap:474 jobs -p
+./stack.sh:exit_trap:474 jobs=
+./stack.sh:exit_trap:477 [[ -n '' ]]
+./stack.sh:exit_trap:483 kill_spinner
+./stack.sh:kill_spinner:369 '[' '!' -z '' ']'
+./stack.sh:exit_trap:485 [[ 1 -ne 0 ]]
+./stack.sh:exit_trap:486 echo 'Error on exit'
Error on exit
+./stack.sh:exit_trap:487 generate-subunit 1463484056 188 fail
./stack.sh: line 487: generate-subunit: command not found

Tried this command too ie sudo pip install -U os-testr and then ./stack.sh , but still facing same issue