ec2_vol: set iops even if unchanged for boto req (#606)

ec2_vol: set iops even if unchanged for boto req

SUMMARY

Set the iops value in req_obj even if the target iops is the same as the existing. This is a required parameter for boto's modify_volume. Fixes #605
ISSUE TYPE

Bugfix Pull Request

COMPONENT NAME
ec2_vol

Reviewed-by: None <None>
Reviewed-by: Alina Buzachis <None>
Reviewed-by: None <None>
(cherry picked from commit 038c047)

changelogs/fragments/606-ec2_vol-set-iops-even-if-unchanged-for-boto-req.yml

@@ -0,0 +1,5 @@
+bugfixes:
+- >-
+  ec2_vol - Sets the Iops value in req_obj even if the iops value
+  has not changed, to allow modifying volume types that require
+  passing an iops value to boto. (https://github.com/ansible-collections/amazon.aws/pull/606)

plugins/modules/ec2_vol.py

@@ -384,6 +384,8 @@ def update_volume(module, ec2_conn, volume):
             if target_iops != original_iops:
                 iops_changed = True
                 req_obj['Iops'] = target_iops
+            else:
+                req_obj['Iops'] = original_iops
         else:
             # If no IOPS value is specified and there was a volume_type update to gp3,
             # the existing value is retained, unless a volume type is modified that supports different values,