Add screen shots for section E

match/modules/E_test-sets/README.md

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+# Match Test Sets and API
+
+Used on the [related wiki page - TBA](#) and the [Understanding Sources module - TBA](#) of training in Canvas.
+
+Images included in this collection:
+
+| File name | Description |
+| --- | --- |
+| [API_Users.png](https://github.internet2.edu/raw/InCommon-Training/comanage-files/master/match/modules/E_test-sets/Edit_system_of_record.png?raw=true) | Screenshot of the form used to edit a System of Record for a Matchgrid. <img src="https://github.internet2.edu/raw/InCommon-Training/comanage-files/master/match/modules/B_understand-sources/Edit_system_of_record.png?raw=true" width=100% alt="Screenshot of the form used to edit an API user for a Match-defined System of Record." /> |
+| [Edit_api_user.png](https://github.internet2.edu/raw/InCommon-Training/comanage-files/master/match/modules/E_test-sets/Edit_api_user.png?raw=true) | Screenshot of the Systems of Record list. <img src="https://github.internet2.edu/raw/InCommon-Training/comanage-files/master/match/modules/E_test-sets/Edit_api_user.png?raw=true" width=100% alt="Screenshot of the list of API Users for Match. The list includes both general api users for the entire Matchgrid, and users for specific Sources of Record." /> |