stability: Increase the number of retries on ec2_instance tests (ansible-collections#187)

* Split imports into a single line

* Increase the max_attempts retries for the ec2_instance tests, we're running a *lot* in parallel which triggers RateLimiting errors

Author: tremble

Diff for: plugins/modules/ec2_instance.py

@@ -810,17 +810,17 @@
 
 from ansible.module_utils.six import string_types
 from ansible.module_utils.six.moves.urllib import parse as urlparse
+from ansible.module_utils._text import to_bytes
 from ansible.module_utils._text import to_native
-import ansible_collections.amazon.aws.plugins.module_utils.ec2 as ec2_utils
-from ansible_collections.amazon.aws.plugins.module_utils.ec2 import (AWSRetry,
-                                                                     ansible_dict_to_boto3_filter_list,
-                                                                     compare_aws_tags,
-                                                                     boto3_tag_list_to_ansible_dict,
-                                                                     ansible_dict_to_boto3_tag_list,
-                                                                     camel_dict_to_snake_dict,
-                                                                     )
 
 from ansible_collections.amazon.aws.plugins.module_utils.core import AnsibleAWSModule
+from ansible_collections.amazon.aws.plugins.module_utils.ec2 import AWSRetry
+from ansible_collections.amazon.aws.plugins.module_utils.ec2 import ansible_dict_to_boto3_filter_list
+from ansible_collections.amazon.aws.plugins.module_utils.ec2 import compare_aws_tags
+from ansible_collections.amazon.aws.plugins.module_utils.ec2 import boto3_tag_list_to_ansible_dict
+from ansible_collections.amazon.aws.plugins.module_utils.ec2 import ansible_dict_to_boto3_tag_list
+from ansible_collections.amazon.aws.plugins.module_utils.ec2 import camel_dict_to_snake_dict
+from ansible_collections.amazon.aws.plugins.module_utils.ec2 import snake_dict_to_camel_dict
 
 module = None
 
@@ -917,7 +917,7 @@ def build_volume_spec(params):
             for int_value in ['volume_size', 'iops']:
                 if int_value in volume['ebs']:
                     volume['ebs'][int_value] = int(volume['ebs'][int_value])
-    return [ec2_utils.snake_dict_to_camel_dict(v, capitalize_first=True) for v in volumes]
+    return [snake_dict_to_camel_dict(v, capitalize_first=True) for v in volumes]
 
 
 def add_or_update_instance_profile(instance, desired_profile_name):

Diff for: tests/integration/targets/ec2_instance/roles/ec2_instance/tasks/main.yml

@@ -24,6 +24,11 @@
       aws_secret_key: "{{ aws_secret_key }}"
       security_token: "{{ security_token | default(omit) }}"
       region: "{{ aws_region }}"
+      aws_config:
+        retries:
+          # Unfortunately AWSRetry doesn't support paginators and boto3's paginators
+          # don't support any configuration of the delay between retries.
+          max_attempts: 20
   collections:
     - amazon.aws
   block: