Fix variable typo introduced in Bug 1630513

Bug https://bugs.launchpad.net/juniperopenstack/+bug/1630513 (native TLS
support between OpenStack's Neutron and contrail-api's neutronapi),
which is long awaited, introduced a variable typo in
contrail-controller/src/api-lib/vnc_api.py.

This fix fixes the bug, and has been tested working in our dev environment,
in so far as neutron-plugin-contrail has stopped throwing stacktraces due
to non-existing variables.

Signed-off-by: Martin Millnert <martin@millnert.se>

Change-Id: I7757e545b3e9b8d302660d562512d6b897823ea1
Closes-Bug: #1636550

src/api-lib/vnc_api.py

@@ -252,7 +252,7 @@ def __init__(self, username=None, password=None, tenant_name=None,
                     certs.append(kscafile)
                 if kscertfile:
                     certs.append(kscertfile)
-                if kskeytfile:
+                if kskeyfile:
                     certs.append(kskeyfile)
                 if certs:
                    self._kscertbundle=utils.getCertKeyCaBundle(VncApi._DEFAULT_KS_CERT_BUNDLE,certs)