Support additional fields for dedicated launch and accept AdditionalI…

…nfo parameter.

These parameters are already supported by boto3.

plugins/modules/ec2_instance.py

@@ -851,6 +851,16 @@
                     returned: always
                     type: str
                     sample: default
+                host_id:
+                    description: The ID of the Dedicated Host on which the instance resides.
+                    returned: always
+                    type: str
+                    sample: ""
+        additional_info:
+            description: Reserved.
+            returned: always
+            type: dict
+            sample:
         private_dns_name:
             description: The private DNS name.
             returned: always
@@ -1293,6 +1303,16 @@ def build_top_level_options(params):
             spec["Placement"]["GroupName"] = str(params.get("placement_group"))
         else:
             spec.setdefault("Placement", {"GroupName": str(params.get("placement_group"))})
+    if params.get("host_id"):
+        if "Placement" in spec:
+            spec["Placement"]["HostId"] = str(params.get("host_id"))
+        else:
+            spec.setdefault("Placement", {"HostId": str(params.get("host_id"))})
+    if params.get("availability_zone"):
+        if "Placement" in spec:
+            spec["Placement"]["AvailabilityZone"] = str(params.get("availability_zone"))
+        else:
+            spec.setdefault("Placement", {"AvailabilityZone": str(params.get("availability_zone"))})
     if params.get("ebs_optimized") is not None:
         spec["EbsOptimized"] = params.get("ebs_optimized")
     if params.get("instance_initiated_shutdown_behavior"):
@@ -1323,6 +1343,8 @@ def build_top_level_options(params):
         )
         spec["MetadataOptions"]["HttpProtocolIpv6"] = params.get("metadata_options").get("http_protocol_ipv6")
         spec["MetadataOptions"]["InstanceMetadataTags"] = params.get("metadata_options").get("instance_metadata_tags")
+    if params.get('additional_info'):
+        spec['AdditionalInfo'] = params.get('additional_info')
 
     return spec
 
@@ -2134,6 +2156,8 @@ def main():
                 instance_metadata_tags=dict(choices=["disabled", "enabled"], default="disabled"),
             ),
         ),
+        additional_info=dict(type='str'),
+        host_id=dict(type="str"),
     )
     # running/present are synonyms
     # as are terminated/absent