updated descrete update calls logic

[ammokhov]

Issue #, if available:

Description of changes:

• added a check if property is the same from previous model then no need to do the api call (backward compatibility)
• added pagination for list tagging (hard fail for update handler and soft fail on read handler)
• added propagation delay for key policy update (as update request might include new tags and updated key policy requires time to provision)
• increased code coverage: instructions: 95% | branch: 95%
• added sam-test folder templates with generic inputs
• added inputs for contract tests

contract test results:

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 FAILED                                        [ 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 FAILED                [ 93%]
handler_update_invalid.py::contract_update_non_existent_resource PASSED               [100%]

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