Implementation of core AWS Mediastore endpoints (#3825)

* write boilerplate code

* generate boilerplate code with scaffold script

* create mediapackage channel

* remove duplicate mediapackage reference

* remove Channel key from mediapackage response

* describe_channel endpoint added

* create_origin_endpoint-added

* keys changed to camel case to fix issue

* minor changes to clean up

* minor clean up again

* implement & test delete_channel

* delete origin endpoint created; WIP-tests failing

* fix delete_origin_endpoint issue

* refactor function call

* delete origin endpoint completed; test_server tests added

* implement and test describe_origin_endpoint

* update origin endpoint added

* remove print statements

* implement test_list_origin_endpoint_succeeds

* create test name changed

* create test name changed

* changes after flake8 and black run

* url assertion added to decribe origin endpoint test

* region dependent url enabled

* initial commit; WIP

* create container added, still WIP

* create_container working

* test_create_channel_succeeds

* test_describe_container_succeeds

* get_lifecycle_policy added; error tests added

* changes to pass linting

* added exception for container but no policy

* linting

* put_container_policy added

* put_metric_policy added

* list_containers added

* resolved linting

* test_describe_container_raises_error_if_container_does_not_exist

* added __init__ file

* __init__ added to mediapackage as well

* Mediastore (#20)

* initial commit; WIP

* create container added, still WIP

* create_container working

* test_create_channel_succeeds

* test_describe_container_succeeds

* get_lifecycle_policy added; error tests added

* changes to pass linting

* added exception for container but no policy

* linting

* put_container_policy added

* put_metric_policy added

* list_containers added

* resolved linting

* test_describe_container_raises_error_if_container_does_not_exist

* added __init__ file

* __init__ added to mediapackage as well

Co-authored-by: FranckNdame <franck.mpouli@yahoo.com>

* test_server fixed; resolved rebasing mix ups on tests

* [FIX] Ensures MediaConnect create_flow sets a valid sourceArn

* code clean up

Co-authored-by: Anya <anya.champaneria@capablue.com>
Co-authored-by: AnyaChamp <71766808+AnyaChamp@users.noreply.github.com>

tests/test_mediaconnect/test_mediaconnect.py

@@ -59,6 +59,9 @@ def test_create_flow_succeeds():
     response["Flow"]["FlowArn"][:26].should.equal("arn:aws:mediaconnect:flow:")
     response["Flow"]["Name"].should.equal("test Flow 1")
     response["Flow"]["Status"].should.equal("STANDBY")
+    response["Flow"]["Sources"][0][
+        "SourceArn"
+    ] == "arn:aws:mediaconnect:source:Source A"
 
 
 @mock_mediaconnect