VMware: update test file names

The tests files names all had prefix vmwareapi. This is no longer
needed as the test files are now under the vmwareapi directory.

The patch also fixed the permission for the file test_vm_util.py.

Change-Id: I87955a0a4d4d2b2c1dd55203658707ce7c6038f0

nova/tests/virt/vmwareapi/test_vif.py

@@ -21,7 +21,7 @@ from nova import exception
 from nova.network import model as network_model
 from nova import test
 from nova.tests import matchers
-from nova.tests.virt.vmwareapi import test_vmwareapi_vm_util
+from nova.tests.virt.vmwareapi import test_vm_util
 from nova.virt.vmwareapi import fake
 from nova.virt.vmwareapi import network_util
 from nova.virt.vmwareapi import vif
@@ -51,7 +51,7 @@ class VMwareVifTestCase(test.NoDBTestCase):
                                   ovs_interfaceid=None,
                                   rxtx_cap=3)
         ])[0]
-        self.session = test_vmwareapi_vm_util.fake_session()
+        self.session = test_vm_util.fake_session()
         self.cluster = None
 
     def tearDown(self):