ec2_vol tests set requires to == rather than >= (so we can test the m…

…inimum we claim) (ansible-collections#453)

ec2_vol tests set botocore requires to == rather than >=

SUMMARY
We currently use >= which generally means that the latest version of botocore will be pulled in.  Given that we specify it's supposed to work with >= we should test the oldest possible version to ensure that we support at least that version.
ISSUE TYPE

Tests Pull Request

COMPONENT NAME
ec2_vol
ADDITIONAL INFORMATION
Depends-on: ansible-collections#460

Reviewed-by: None <None>

tests/integration/targets/ec2_vol/tasks/main.yml

@@ -10,8 +10,8 @@
 
 - pip:
     name:
-      - 'boto3>=1.16.33'
-      - 'botocore>=1.13.0'
+      - 'boto3>=1.13.0'
+      - 'botocore==1.19.27'
       - 'coverage<5'
       - 'boto>=2.49.0'
     virtualenv: "{{ virtualenv }}"