nvmetcli: Install nvmetcli in /usr/sbin with setup.py

According to the README, one can install nvmetcli through setup.py.
When one tries this though, the nvmetcli isn't configured in system's
$PATH.

Adding nvmetcli to scripts argument in setup call does half of the job.
Then, in order to install it in the correct location in a maintanable
way it's introduced setup.cfg file which contains 'install_scripts'
parameter for 'install' command set to /usr/sbin.

Nothing changes on the .deb package creation, the .rpm package process
in the other hand was made simpler by lines that are now done by
setup.py + setup.cfg settings.

Signed-off-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

rpm/nvmetcli.spec.tmpl

@@ -29,8 +29,6 @@ as well as saving / restoring the configuration to / from a json file.
 rm -rf %{buildroot}
 %{__python} setup.py install --skip-build --root=%{buildroot} --prefix=usr
 mkdir -p %{buildroot}%{_sysconfdir}/nvmet
-mkdir -p %{buildroot}/usr/sbin
-install -m 755 nvmetcli %{buildroot}/usr/sbin/nvmetcli
 mkdir -p %{buildroot}%{_unitdir}
 install -m 644 nvmet.service %{buildroot}%{_unitdir}/nvmet.service
 

setup.cfg

+[install]
+install_scripts=/usr/sbin

setup.py

@@ -27,4 +27,5 @@ setup(
     maintainer_email = 'hch@lst.de',
     test_suite='nose2.collector.collector',
     packages = ['nvmet'],
+    scripts=['nvmetcli']
     )