This enable one to find a datastore with no config_target supplied

Signed-off-by: Vyronas Tsingaras <vtsingaras@it.auth.gr>

lib/ansible/modules/cloud/vmware/vsphere_guest.py

@@ -410,6 +410,7 @@ def add_nic(module, s, nfmor, config, devices, nic_type="vmxnet3", network_name=
 def find_datastore(module, s, datastore, config_target):
     # Verify the datastore exists and put it in brackets if it does.
     ds = None
+    if config_target:
         for d in config_target.Datastore:
             if (d.Datastore.Accessible and
                 (datastore and d.Datastore.Name == datastore)
@@ -417,6 +418,13 @@ def find_datastore(module, s, datastore, config_target):
                 ds = d.Datastore.Datastore
                 datastore = d.Datastore.Name
                 break
+    else:
+        for ds_mor, ds_name in server.get_datastores().items():
+            ds_props = VIProperty(s, ds_mor)
+            if (ds_props.summary.accessible and (datastore and ds_name == datastore)
+                    or (not datastore)):
+                ds = ds_mor
+                datastore = ds_name
     if not ds:
         s.disconnect()
         module.fail_json(msg="Datastore: %s does not appear to exist" %