Add so files from the specified version to the test image #452

Job	Run time
push-test-images-for-dev (pgupgradetester)	22s
push-test-images-for-dev (stylechecker)	2m 57s
prepare_pgversion_matrix	6s
push-test-images-for-dev (citusupgradetester)	5m 37s
push-test-images-for-release	0s
push-test-images-for-dev (exttester, 18.1)	20s
push-test-images-for-dev (extbuilder, 17.7)	1m 57s
push-test-images-for-dev (extbuilder, 16.11)	1m 31s
push-test-images-for-dev (failtester, 17.7)	2m 15s
push-test-images-for-dev (failtester, 18.1)	2m 16s
push-test-images-for-dev (extbuilder, 18.1)	1m 29s
push-test-images-for-dev (exttester, 16.11)	21s
push-test-images-for-dev (failtester, 16.11)	2m 21s
push-test-images-for-dev (exttester, 17.7)	6s
	21m 38s

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