Fixing some of the contract tests for Domain.

[jonjara]

Issue #, if available:

Description of changes: Adding in some fixes that make the handlers to adhere to https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-type-test-contract.html.

contract_invalid_create still doesn't pass and I am going to reach out to CloudFormation to get guidance on this test

NOTES:

• I am manually adding in arns to the ListHandlers but we will not do this when ListDomains populates the arn in it's sdk response. The reason it's needed is because the primary identifier needs to be populated after a list operation
• Also removing domainOwner from some of the operations because I am assuming that for for update/read permissions policies and describe domain, we are always doing so in the account the CFN stack is in.

Testing

handler_create.py::contract_create_delete PASSED                         [  6%]
handler_create.py::contract_invalid_create PASSED                        [ 12%]
handler_create.py::contract_create_duplicate SKIPPED                     [ 18%]
handler_create.py::contract_create_read_success PASSED                   [ 25%]
handler_create.py::contract_create_list_success PASSED                   [ 31%]
handler_delete.py::contract_delete_read PASSED                           [ 37%]
handler_delete.py::contract_delete_list PASSED                           [ 43%]
handler_delete.py::contract_delete_update PASSED                         [ 50%]
handler_delete.py::contract_delete_delete PASSED                         [ 56%]
handler_delete.py::contract_delete_create SKIPPED                        [ 62%]
handler_misc.py::contract_check_asserts_work PASSED                      [ 68%]
handler_read.py::contract_read_without_create PASSED                     [ 75%]
handler_update.py::contract_update_read_success PASSED                   [ 81%]
handler_update.py::contract_update_list_success PASSED                   [ 87%]
handler_update_invalid.py::contract_update_create_only_property PASSED   [ 93%]
handler_update_invalid.py::contract_update_non_existent_resource PASSED  [100%]

When I run the tests that ERROR by themselves they pass

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