Tests

Add skipDuplicates() scope guard to createDocuments #3378

Job	Run time
Setup & Build Docker Image	32s
Unit Test	1m 6s
Adapter Tests (SQLite)	2m 27s
Adapter Tests (Pool)	4m 7s
Adapter Tests (Schemaless/MongoDB)	3m 0s
Adapter Tests (Postgres)	2m 52s
Adapter Tests (SharedTables/SQLite)	2m 24s
Adapter Tests (Mirror)	3m 18s
Adapter Tests (SharedTables/MySQL)	3m 43s
Adapter Tests (SharedTables/Postgres)	2m 52s
Adapter Tests (MySQL)	3m 24s
Adapter Tests (MongoDB)	1m 41s
Adapter Tests (MariaDB)	2m 58s
Adapter Tests (SharedTables/MariaDB)	2m 57s
Adapter Tests (SharedTables/MongoDB)	1m 37s
	38m 58s

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