Fix failing genconfig target

The target fails in a clean repo because the target directory does not
exist.

Also install the runtime dependencies to avoid keep ncclient in both
requirements and test requirements.

Change-Id: Ie71869a8871da6211bb6b9690b98dc1d5d9f8635

.gitignore

@@ -41,3 +41,6 @@ ChangeLog
 
 # Vagrant
 .vagrant
+
+# Sample config file
+*.ini.sample

test-requirements.txt

@@ -4,4 +4,3 @@ python-subunit>=1.0.0 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
-ncclient>=0.6.9 # Apache-2.0

tox.ini

@@ -74,10 +74,10 @@ commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:genconfig]
-deps =
-   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-   -r{toxinidir}/test-requirements.txt
+allowlist_externals =
+  mkdir
 commands =
+  mkdir -p {toxinidir}/etc/neutron/plugins/ml2
   oslo-config-generator --config-file=tools/config/networking-baremetal-ironic-neutron-agent.conf
   oslo-config-generator --config-file=tools/config/networking-baremetal-common-device-driver-opts.conf
   oslo-config-generator --config-file=tools/config/networking-baremetal-netconf-openconfig-driver-opts.conf