Move NOOP Infra driver from tests folder to tacker/vm

And also changes the path of mgmt_driver in setup.cfg

Change-Id: I3d2e59f98d73ac6240b159305f39929eb1ec46ef
Closes-Bug: #1483926
Related-Bug: 1483926

setup.cfg

@@ -53,7 +53,7 @@ tacker.servicevm.device.drivers =
     nova = tacker.vm.drivers.nova.nova:DeviceNova
     heat = tacker.vm.drivers.heat.heat:DeviceHeat
 tacker.servicevm.mgmt.drivers =
-    noop = tacker.tests.unit.services.vm.mgmt_drivers.noop:DeviceMgmtNoop
+    noop = tacker.vm.mgmt_drivers.noop:DeviceMgmtNoop
     agent_rpc = tacker.vm.mgmt_drivers.rpc.rpc:AgentRpcMGMTDriver
     agent_proxy = tacker.vm.mgmt_drivers.rpc.proxy:AgentRpcProxyMGMTDriver
     openwrt = tacker.vm.mgmt_drivers.openwrt.openwrt:DeviceMgmtOpenWRT