Add new Amazon EBS volume types. Fixes issue 4041 of ansible-modules-core

lib/ansible/modules/cloud/amazon/ec2_vol.py

@@ -50,8 +50,7 @@ options:
     default: null
   volume_type:
     description:
-      - Type of EBS volume; standard (magnetic), gp2 (SSD), io1 (Provisioned IOPS). "Standard" is the old EBS default
-        and continues to remain the Ansible default for backwards compatibility.
+      - Type of EBS volume; standard (magnetic), gp2 (SSD), io1 (Provisioned IOPS), st1 (Throughput Optimized HDD), sc1 (Cold HDD). "Standard" is the old EBS default and continues to remain the Ansible default for backwards compatibility.
     required: false
     default: standard
     version_added: "1.9"
@@ -484,7 +483,7 @@ def main():
             id = dict(),
             name = dict(),
             volume_size = dict(),
-            volume_type = dict(choices=['standard', 'gp2', 'io1'], default='standard'),
+            volume_type = dict(choices=['standard', 'gp2', 'io1', 'st1', 'sc1'], default='standard'),
             iops = dict(),
             encrypted = dict(type='bool', default=False),
             device_name = dict(),