Move error state to under extensions #6

Job	Run time
Coding Standard	45s
Static analysis	46s
tests (8.0, 5.4.*, lowest, none)	35s
tests (8.0, 5.4.*, highest, none)	2m 13s
tests (8.0, 6.0.*, lowest, none)	26s
tests (8.0, 6.0.*, highest, none)	32s
tests (8.1, 5.4.*, lowest, none)	25s
tests (8.1, 5.4.*, highest, none)	1m 1s
tests (8.1, 6.0.*, lowest, none)	30s
tests (8.1, 6.0.*, highest, none)	53s
tests (8.1, 6.2.*, lowest, none)	31s
tests (8.1, 6.2.*, highest, none)	32s
tests (8.1, 6.4.*, lowest, none)	59s
tests (8.1, 6.4.*, highest, none)	42s
tests (8.2, 5.4.*, lowest, none)	32s
tests (8.2, 5.4.*, highest, none)	29s
tests (8.2, 6.0.*, lowest, none)	34s
tests (8.2, 6.0.*, highest, none)	43s
tests (8.2, 6.2.*, lowest, none)	40s
tests (8.2, 6.2.*, highest, none)	30s
tests (8.2, 6.4.*, lowest, none)	33s
tests (8.2, 6.4.*, highest, none)	41s
tests (8.0, 5.4.*, lowest, --dev symfony/validator doctrine/orm doctrine/annotations)	2m 39s
tests (8.0, 5.4.*, lowest, pcov)	45s
	18m 56s

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