IBX-1756: Added id attribute to custom tags (#238) #124

Job	Run time
Solr integration tests	1m 10s
Run code style check (8.0)	38s
Tests (7.3)	44s
Tests (7.4)	45s
Tests (8.0)	42s
Tests (8.1)	39s
PostgreSQL integration tests (7.4)	1m 7s
PostgreSQL integration tests (8.0)	1m 2s
PostgreSQL integration tests (8.1)	1m 5s
MySQL integration tests (7.4)	1m 13s
MySQL integration tests (8.0)	1m 33s
MySQL integration tests (8.1)	1m 32s
	12m 10s

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