IAM group modules need `module` passed

The IAM group modules were not receiving the `module` object, but they
use `module.fail_json()` in their exception handlers. This patch passes
through the module object so the real errors from boto are exposed,
rather than errors about "NoneType has no method `fail_json`".

lib/ansible/modules/cloud/amazon/iam.py

@@ -748,11 +748,12 @@ def main():
         group_exists = name in orig_group_list
 
         if state == 'present' and not group_exists:
-            new_group, changed = create_group(iam=iam, name=name, path=path)
+            new_group, changed = create_group(module=module, iam=iam, name=name, path=path)
             module.exit_json(changed=changed, group_name=new_group)
         elif state in ['present', 'update'] and group_exists:
             changed, updated_name, updated_path, cur_path = update_group(
-                iam=iam, name=name, new_name=new_name, new_path=new_path)
+                module=module, iam=iam, name=name, new_name=new_name,
+                new_path=new_path)
 
             if new_path and new_name:
                 module.exit_json(changed=changed, old_group_name=name,
@@ -774,11 +775,11 @@ def main():
 
         elif state == 'update' and not group_exists:
             module.fail_json(
-                changed=changed, msg="Update Failed. Group %s doesn't seem to exit!" % name)
+                changed=changed, msg="Update Failed. Group %s doesn't seem to exist!" % name)
 
         elif state == 'absent':
             if name in orig_group_list:
-                removed_group, changed = delete_group(iam=iam, name=name)
+                removed_group, changed = delete_group(module=module, iam=iam, name=name)
                 module.exit_json(changed=changed, delete_group=removed_group)
             else:
                 module.exit_json(changed=changed, msg="Group already absent")