##### 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

disk_index = 0
        for expected_disk_spec in self.params.get('disk'):
            disk_modified = False
            
            if vm_obj is not None and disks is not None and disk_index < len(disks):
                diskspec = vim.vm.device.VirtualDeviceSpec()
                
                diskspec.operation = vim.vm.device.VirtualDeviceSpec.Operation.edit
                diskspec.device = disks[disk_index]
            else:
                diskspec = self.device_helper.create_scsi_disk(scsi_ctl, disk_index)
                disk_modified = True
            
            disk_index += 1
            
            if disk_index == 7:
                disk_index += 1
            if 'disk_mode' in expected_disk_spec:
                disk_mode = expected_disk_spec.get('disk_mode', 'persistent').lower()
                valid_disk_mode = ['persistent', 'independent_persistent', 'independent_nonpersistent']
                if disk_mode not in valid_disk_mode:
                    self.module.fail_json(msg="disk_mode specified is not valid."
                                              " Should be one of ['%s']" % "', '".join(valid_disk_mode))
                if (vm_obj and diskspec.device.backing.diskMode != disk_mode) or (vm_obj is None):
                    diskspec.device.backing.diskMode = disk_mode
                    disk_modified = True
            else:
                diskspec.device.backing.diskMode = "persistent"
            
            if 'type' in expected_disk_spec: