Avoid use of '/tmp' for pip operations
`ipa-run-tests` is not an entry_point script, so
pip during an installation of ipatests package checks
if the file path is executable. If not - just don't set
the executable permission bits.
pip's working directory defaults to /tmp/xxx.
Thus, if /tmp is mounted with noexec such scripts lose
their executable ability after an installation into
virtualenv. This was found on Travis +
freeipa/freeipa-test-runner:master-latest docker image.
Build directory of pip could be changed via env variable
PIP_BUILD, for example.
Fixes: https://pagure.io/freeipa/issue/8009
Signed-off-by: Stanislav Levin <slev@altlinux.org>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>