##### SUMMARY
`docker_container` should so some sanity checks that not two volumes / mount points use the same target inside the container, so that especially when recreating containers, they won't be destroyed first before recreating fails.

This becomes more important once #49808 is merged.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
docker_container

##### ANSIBLE VERSION
```
2.8.0
```

links:
          - db_test:db
      - name: TestingNet2
- name: Start a container with a command
  docker_container:
    name: sleepy
    image: ubuntu:14.04
    command: ["sleep", "infinity"]
- name: Add container to networks
  docker_container:
    name: sleepy
    networks:
      - name: TestingNet
        ipv4_address: 172.1.1.18
        links:
          - sleeper
      - name: TestingNet2
        ipv4_address: 172.1.10.20
- name: Update network with aliases
  docker_container:
    name: sleepy
    networks:
      - name: TestingNet
        aliases:
          - sleepyz
          - zzzz
- name: Remove container from one network
  docker_container:
    name: sleepy
    networks: