Issue #3272557: Modify the test scenario to test with two instance types

modules/cloud_service_providers/aws_cloud/tests/src/Behat/features/templates/params/common.yml

@@ -35,12 +35,12 @@ instance_name_1:
 instance_name_2:
   BDD_Instance_2_@Random
 instance_type:
-  c3.large
+  t3.nano
 # instance_*_n for instance testing in a loop.
 instance_type_1:
-  c3.large
+  m5.large
 instance_type_2:
-  t3.nano
+  t3.micro
 internet_gateway:
   BDD_IG_@Random
 ip_protocol: