* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.
Fix adds refactor of code for find_host_by_cluster_datacenter
API in vmware_host and vmware_resource_pool.
Also, adds strict check for cluster and datacenter object find.
Testcase for vmware_resource_pool.
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>