Merge branch '1.3' into 4.5 #1372

Job	Run time
Solr integration tests (7.4)	12m 28s
Unit tests & SQLite integration tests (7.4)	6m 51s
Solr integration tests (8.0)	12m 22s
Run code style check (8.0)	2m 31s
Unit tests & SQLite integration tests (8.0)	11m 21s
Solr integration tests (8.1)	11m 39s
Unit tests & SQLite integration tests (8.1)	14m 18s
PostgreSQL integration tests (7.4)	24m 22s
MySQL integration tests (7.4)	22m 9s
PostgreSQL integration tests (8.0)	38m 57s
MySQL integration tests (8.0)	18m 36s
PostgreSQL integration tests (8.1)	24m 20s
MySQL integration tests (8.1)	12m 18s
	3h 32m 12s

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