##### SUMMARY

The following snippet from https://github.com/ansible/ansible/blob/devel/test/integration/targets/vmware_guest/tasks/create_d1_c1_f0.yml uses `autoselect_datastore: True`.

```yaml
- name: create new VMs
  vmware_guest:
    validate_certs: False
    hostname: "{{ vcenter_hostname }}"
    username: "{{ vcenter_username }}"
    password: "{{ vcenter_password }}"
    name: newvm_1
    #template: "{{ item|basename }}"
    guest_id: centos64Guest
    datacenter: "{{ dc1 }}"
    hardware:
        num_cpus: 1
        num_cpu_cores_per_socket: 1
        memory_mb: 256
        hotadd_memory: true
        hotadd_cpu: false
        max_connections: 10
    disk:
        - size: 1gb
          type: thin
          autoselect_datastore: True
    state: poweredoff
    folder: F0
```

One of my two datastores is dedicated to the ISO image and so, is readOnly. But it still get selected consistently. I use the following hack to avoid the problem:

```diff
diff --git a/lib/ansible/modules/cloud/vmware/vmware_guest.py b/lib/ansible/modules/cloud/vmware/vmware_guest.py
index 6a63e97798..3648e3e87f 100644
--- a/lib/ansible/modules/cloud/vmware/vmware_guest.py
+++ b/lib/ansible/modules/cloud/vmware/vmware_guest.py
@@ -1925,6 +1925,15 @@ class PyVmomiHelper(PyVmomi):
 
                 datastore_freespace = 0
                 for ds in datastores:
+                    is_readonly = False
+                    for h in ds.host:
+                        if h.mountInfo.accessMode == 'readOnly':
+                            is_readonly = True
+                            break
+
+                    if is_readonly:
+                        continue
+
                     if (ds.summary.freeSpace > datastore_freespace) or (ds.summary.freeSpace == datastore_freespace and not datastore):
                         # If datastore field is provided, filter destination datastores
                         if 'datastore' in self.params['disk'][0] and \
```
<!--- Explain the problem briefly below -->

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->

vmware_guest

display.info('Using the existing vCenter simulator docker container.', verbosity=1)
        else:
            display.info('Starting a new vCenter simulator docker container.', verbosity=1)
            if not self.args.docker and not container_id:
                
                publish_ports = [
                    '-p', '80:80',
                    '-p', '443:443',
                    '-p', '8080:8080',
                    '-p', '8989:8989',
                    '-p', '5000:5000',  
                ]
            else:
                publish_ports = []
            if not os.environ.get('ANSIBLE_VCSIM_CONTAINER'):
                docker_pull(self.args, self.image)
            docker_run(
                self.args,
                self.image,
                ['-d', '--name', self.container_name] + publish_ports,
            )
        if self.args.docker:
            vcenter_host = self.DOCKER_SIMULATOR_NAME
        elif container_id:
            vcenter_host = self._get_simulator_address()
            display.info('Found vCenter simulator container address: %s' % vcenter_host, verbosity=1)
        else:
            vcenter_host = 'localhost'
        self._set_cloud_config('vcenter_host', vcenter_host)
    def _get_simulator_address(self):