Mass update of docs and tests (credentials/session tokens) (#1921)

Mass update of docs and tests (credentials/session tokens)

SUMMARY
We had a cleanup of credentials/session parameters which included a batch of deprecations and renames.
Ensure that all of our tests and docs are using the 'canonical' names
ISSUE TYPE

Docs Pull Request

COMPONENT NAME
plugins/modules/batch_compute_environment.py
plugins/modules/cloudformation_exports_info.py
plugins/modules/ec2_vpc_vpn.py
plugins/modules/elasticache.py
plugins/modules/elasticache_parameter_group.py
plugins/modules/elasticache_snapshot.py
plugins/modules/ses_rule_set.py
plugins/modules/sts_assume_role.py
plugins/modules/sts_session_token.py
tests/integration
ADDITIONAL INFORMATION
See also

#1172
#1714

Reviewed-by: Alina Buzachis

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections/community.aws@4a5b50e

tests/integration/targets/ec2_placement_group/tasks/main.yml

@@ -1,9 +1,9 @@
 - name: run ec2_placement_group tests
   module_defaults:
     group/aws:
-      aws_access_key: "{{ aws_access_key }}"
-      aws_secret_key: "{{ aws_secret_key }}"
-      security_token: "{{ security_token | default(omit) }}"
+      access_key: "{{ aws_access_key }}"
+      secret_key: "{{ aws_secret_key }}"
+      session_token: "{{ security_token | default(omit) }}"
       region: "{{ aws_region }}"
   collections:
     - amazon.aws