DigitalOcean: typecast map function for Python3 (#37126)

In Python2, `map` returns list whereas Python3, `map` function
 returns iterator. This fix typecast map function for Python3.

Fixes: #37114

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

lib/ansible/modules/cloud/digital_ocean/digital_ocean.py

@@ -307,7 +307,7 @@ class Droplet(JsonfyMixIn):
     @classmethod
     def list_all(cls):
         json = cls.manager.all_active_droplets()
-        return map(cls, json)
+        return list(map(cls, json))
 
 
 class SSH(JsonfyMixIn):
@@ -338,7 +338,7 @@ class SSH(JsonfyMixIn):
     @classmethod
     def list_all(cls):
         json = cls.manager.all_ssh_keys()
-        return map(cls, json)
+        return list(map(cls, json))
 
     @classmethod
     def add(cls, name, key_pub):