Cleanups, simplifications, and small bugfixes. #1539

Job	Run time
Nightly Quarkus and GraalVM build	24m 59s
Native Tests - Main	11m 53s
Native Tests - Data1	35m 41s
Native Tests - Data2	31m 24s
Native Tests - Data3	30m 32s
Native Tests - Data4	21m 40s
Native Tests - Data5	24m 54s
Native Tests - Data6	28m 34s
Native Tests - Data7	39m 52s
Native Tests - Amazon	18m 48s
Native Tests - Messaging1	34m 7s
Native Tests - Messaging2	17m 10s
Native Tests - Security1	27m 34s
Native Tests - Security2	33m 15s
Native Tests - Security3	18m 2s
Native Tests - Cache	22m 40s
Native Tests - HTTP	44m 37s
Native Tests - Misc1	32m 1s
Native Tests - Misc2	19m 4s
Native Tests - Misc3	38m 6s
Native Tests - Misc4	49m 26s
Native Tests - Spring	20m 21s
Native Tests - gRPC	22m 12s
Native Tests - Windows - RESTEasy Jackson	3m 5s
Native Tests - DevTools Integration Tests	7m 24s
Native Tests - AWT, ImageIO and Java2D	11m 21s
	11h 8m 42s

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