[5.0 Vcenter] Instances can launch on ESXI host in case contrail-vmware node was removed for it.

[Olesia Tsvigun]

Fuel 9.0
fuel-plugin-contrail 5.0 build#699

Steps to reproduce
   1. Install fuel-plugin-contrail with vmware.
   2. Create a new environment with following parameters:
       * Compute: vCenter
       * Networking: Neutron with tunneling segmentation
       * Storage: default
       * Additional services: default
    3. Run script that prepares vmware part for deployment (creates few Distributed Switches and spawns virtual machine on each ESXi node)
    4. Configure Contrail plugin settings:
       * Datastore name
       * Datacenter name
       * Uplink for DVS external
       * Uplink for DVS private
       * DVS external
       * DVS internal
       * DVS private
    5. Add nodes with following roles:
       * Controller
       * Compute-VMWare
       * 2 Contrail-vmware
       * Compute
       * Contrail-config + contrail-control + contrail-db + contrail-analytics
    6. Configure interfaces on nodes.
    7. Configure network settings.
    8. Configure VMware vCenter settings on VMware tab.
    9. Deploy the cluster.
    10. Remove one contrail-vmware node.
    11. deploy changes.
    12. Launch few instances.

Actual Result
Instances were launched on ESXI host for which contrail-vmware node was deleted from Fuel.

Expected Result
Instances should be not launched on ESXI host for which contrail-vmware node was deleted from Fuel.

[Vitalii Kovalchuk (vkovalchuk)]

Find that contrail-vcenter-plugin service wasn't restarted when we update ESXiToVRouterIp.map
this issue already fixed https://review.openstack.org/#/c/382922/
But still it spawns vm's on ESXi host where we remove ContrailVM instance.

[Illia Polliul (ipolliul)]

All ESXi hosts in vCenter cluster should have ContrailVM (contrail-vmware) running.

If ESXi host needs to be removed from vCenter cluster corresponding VM can be removed and ESXi also need to be removed from the cluster.